Subject: Re: My broken DataQ AD converter From: "tchannel" tchannel@.............. Date: Sat, 31 Mar 2007 13:29:46 -0600 Well Chris, You did it again! I hope your head doesn't get too = big.....But facts are facts. From way over there, in the UK?, you were = able to help me fix this silly AD board, here in Boise Idaho, USA....... I do believe you were correct at every turn.... 1 I do think this is an older 194 8 bit board, from your physical = description. 2 The resistor numbers on the surface mount components were 1003, and = 2003. Of course the two missing ones had no numbers. But there was a = pattern as the resistors were in a row, something like = 1003,2003,1003,2003,1003,2003,xxxx,2003, so I figured the xxxx was the = 1003, 100K 3 The other missing resistor was near others which had the 2003, so I = figured the xxxx would be a 200K, the way it is built I could not see = where these resistors were in the circuit. I soldered in the two = missing resistors, and it is now working!!!!!!! 4 I did go to AmaSeis .ini files but did not see any "Channel # listed" = so maybe it is always going to be Channel 1. and never Channel 2,3, or 4. 5 I do think you are correct about someone modifying the board to run = as a +5v and a -0, as these two missing resistors just did not fail and = fall off, they look like they were purposely popped off, small scratch = marks in their place. Again, Many Thanks, Ted ----- Original Message -----=20 From: ChrisAtUpw@.......... To: psn-l@................. Sent: Saturday, March 31, 2007 12:00 PM Subject: Re: My broken DataQ AD converter In a message dated 2007/03/31, tchannel@.............. writes: Hi All, Looking closely at the board I see two resistors which are = "Open" "cracked" Its a wonder it works at all, but some parts of it do work. Channel = 1, only puts out + voltage, just a small amount of - I think that account for the AmaSeis trace showing only the top part = of an earthquake. Hi Ted, The input resistors are two 200 K in series. The offset line is = 100 K to the centre point. If any of them are damaged, it should not be = difficult to replace them. Alternatively, could you unsolder the = resistors on CH4 and replace the ones on CH1? The resistor values are = printed on them eg 2003. I get about -0.59 V on the offset line and about 90 mV on the = input. I suspect that this is because the ADC is not in operating mode. = The offset line should be -5V for +/-10V input. Check the voltage on the = offset line while the channel is switched on? However Channel, 2,3,4 all seem to work showing both positive and = negative movement "In DataQ Software Only", in this software Channel 1, = only shows positive trace movement, and, no negative. You could get this with failed resistors. Is the range 5V or = 10V? I suspect that the ADC may have been 'modified' for a single = polarity 5V signal? Can the friend who gave it to you provide any = information?=20 When I connected my Sensor to Channel 2,3 or 4 Using DataQ, I was = thinking it would then work in AmaSeis, but it does not. It looks as if = AmaSeis will not read any Channel except Channel 1. Even though in DataQ = Channel 2,3,4 all seem to work fine. If I connect the sensor to Channel = 3, AmaSeis shows a trace, but the trace does not move in either = direction if I stimulate the sensor. This is true for Channel, 2,3,4. = Only Channel 1, moves the trace in AmaSeis. I think you can change the com port, in AmaSeis, but is there = anywhere you can or need to change for Channel selection? In DataQ I closed all the Channels except Ch. 3 and saved before = closing. So If I were just using DataQ software, I would be = operational. Amaseis normally uses CH1 only. However there are two setup = files Amaseis.ini and AS1.ini. It may be possible to set a different = channel by editing and then saving the file, but I am not sure. I know = that you get your different sample rates this way. If you use a Dataq = and Amaseis without editing the ini file, you just get 6 SPS. This information is taken from an old 8 bit DI-194 board, which = I suspect that you have. Regards, Chris Chapman
Well Chris, You did it again!  I = hope your=20 head doesn't get too big.....But facts are facts. From way over there, = in the=20 UK?, you were able to help me fix this silly AD board, here in Boise = Idaho,=20 USA.......
 
I do believe you were correct at every=20 turn....
 
1  I do think this is an older 194 = 8 bit=20 board, from your physical description.
2  The resistor numbers on the = surface mount=20 components were 1003, and 2003.  Of course the two missing ones had = no=20 numbers.  But there was a pattern as the resistors were in a row, = something=20 like 1003,2003,1003,2003,1003,2003,xxxx,2003, so I figured the xxxx was = the=20 1003, 100K
3  The other missing resistor was = near others=20 which had the 2003, so I figured the xxxx would be a 200K, the way it is = built I=20 could not see where these resistors were in the circuit.  I = soldered in the=20 two missing resistors, and it is now working!!!!!!!
 
4  I did go to AmaSeis .ini files = but did not=20 see any "Channel # listed"  so maybe it is always going to be = Channel=20 1.
and never Channel 2,3, or = 4.
5  I do think you are correct = about someone=20 modifying the board to run as a +5v and a -0, as these two missing = resistors=20 just did not fail and fall off, they look like they were purposely = popped off,=20 small scratch marks in their place.
 
Again, Many Thanks, Ted
 
----- Original Message -----
From:=20 ChrisAtUpw@.......
To: psn-l@..............
Sent: Saturday, March 31, 2007 = 12:00=20 PM
Subject: Re: My broken DataQ AD = converter

In a=20 message dated 2007/03/31, tchannel@..............=20 writes:

Hi All, Looking closely at the board I see two resistors = which=20 are "Open" "cracked"
Its a wonder it works at all, but some parts of it = do work.=20 Channel 1, only puts out + voltage, just a small amount of = -
I think that = account for the=20 AmaSeis trace showing only the top part of an = earthquake.

Hi=20 Ted,

       The input resistors = are two=20 200 K in series. The offset line is 100 K to the centre point. If any = of them=20 are damaged, it should not be difficult to replace them. = Alternatively, could=20 you  unsolder the resistors on CH4 and replace the ones on CH1? = The=20 resistor values are printed on them eg=20 2003.
       I get about -0.59 V on = the=20 offset line and about 90 mV on the input. I suspect that this is = because the=20 ADC is not in operating mode. The offset line should be -5V for +/-10V = input.=20 Check the voltage on the offset line while the channel is switched=20 on?

 However Channel, 2,3,4 all seem to work showing both = positive=20 and negative movement "In DataQ Software Only", in this software = Channel 1,=20 only shows positive trace movement, and, no negative.

       You=20 could get this with failed resistors. Is the range 5V or 10V? I = suspect that=20 the ADC may have been 'modified' for a single polarity 5V signal? Can = the=20 friend who gave it to you provide any information?

When I connected my Sensor to Channel 2,3 or 4 Using=20 DataQ,  I was thinking it would then work in AmaSeis, but it = does=20 not.  It looks as if AmaSeis will not read any Channel except = Channel=20 1. Even though in DataQ Channel 2,3,4 all seem to work fine.  = If I=20 connect the sensor to Channel 3,  AmaSeis shows a trace, but = the trace=20 does not move in either direction if I stimulate the sensor.  = This is=20 true for Channel, 2,3,4.  Only Channel 1, moves the trace in=20 AmaSeis.
I think you can change the com port, in AmaSeis, = but is there=20 anywhere you can or need to change for Channel = selection?
In DataQ I = closed all the=20 Channels except Ch. 3 and saved before closing.  So If I were = just=20 using DataQ software, I would be operational.

       Amaseis = normally uses=20 CH1 only. However there are two setup files Amaseis.ini and AS1.ini. = It may be=20 possible to set a different channel by editing and then saving the = file, but I=20 am not sure. I know that you get your different sample rates this way. = If you=20 use a Dataq and Amaseis without editing the ini file, you just get 6=20 SPS.

       This information is = taken=20 from an old 8 bit DI-194 board, which I suspect that you=20 have.

      =20 Regards,

       Chris = Chapman=20 Subject: Large earthquake near Solomon Islands From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Sun, 01 Apr 2007 21:33:40 +0000 Hi all At 20:39 there was a Mw7.6 earthquake according to automatic data near Solomon Islands. But based on how the earthquake is appearing on plots around the world, I assume it is at least 0.5 magnitude bigger then automatic system assume. Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: My broken DataQ AD converter From: "Geoffrey" gmvoeth@........... Date: Sun, 1 Apr 2007 14:38:28 -0700 Someone who has reworked a PWB (printed wiring board) will most always leave signs like scratch marks or noticibly different solder work. Resistors will be cut and left in place rather than unsoldering them because a PWB can only take so much heat before the foil starts to peal away. No sense in doing unnecessary soldering. You must look with a magnifying glass at the solder joints to make sure they are well wetted and no fine hairs of conductive materials are where they are not wanted. No resistor should ever be burnt or the board under them. You really must have a schematic because the job of tracing out one yourself can be next to impossible. In past years the manufacturers would almost always provide schematics but today since most US industry has gone overseas these forign places will refuse to let you get the schematic thill the equipment is old and obsolete. It is not practicle for the common man to work on surface mounted technology you need to work on the new boards is expensive and medical like tools require fine skills. If you like electronics as a hobby it is best to go to a university and become an engineer. Technologist or if all else fails a Technician. Without the proper tools throw the old one away and buy a new one. You will waste your life/monies in trivial pursuits. ----- Original Message ----- From: "tchannel" To: Sent: Saturday, March 31, 2007 12:29 Subject: Re: My broken DataQ AD converter Well Chris, You did it again! I hope your head doesn't get too big.....But facts are facts. From way over there, in the UK?, you were able to help me fix this silly AD board, here in Boise Idaho, USA....... I do believe you were correct at every turn.... 1 I do think this is an older 194 8 bit board, from your physical description. 2 The resistor numbers on the surface mount components were 1003, and 2003. Of course the two missing ones had no numbers. But there was a pattern as the resistors were in a row, something like 1003,2003,1003,2003,1003,2003,xxxx,2003, so I figured the xxxx was the 1003, 100K 3 The other missing resistor was near others which had the 2003, so I figured the xxxx would be a 200K, the way it is built I could not see where these resistors were in the circuit. I soldered in the two missing resistors, and it is now working!!!!!!! 4 I did go to AmaSeis .ini files but did not see any "Channel # listed" so maybe it is always going to be Channel 1. and never Channel 2,3, or 4. 5 I do think you are correct about someone modifying the board to run as a +5v and a -0, as these two missing resistors just did not fail and fall off, they look like they were purposely popped off, small scratch marks in their place. Again, Many Thanks, Ted ----- Original Message ----- From: ChrisAtUpw@....... To: psn-l@.............. Sent: Saturday, March 31, 2007 12:00 PM Subject: Re: My broken DataQ AD converter In a message dated 2007/03/31, tchannel@.............. writes: Hi All, Looking closely at the board I see two resistors which are "Open" "cracked" Its a wonder it works at all, but some parts of it do work. Channel 1, only puts out + voltage, just a small amount of - I think that account for the AmaSeis trace showing only the top part of an earthquake. Hi Ted, The input resistors are two 200 K in series. The offset line is 100 K to the centre point. If any of them are damaged, it should not be difficult to replace them. Alternatively, could you unsolder the resistors on CH4 and replace the ones on CH1? The resistor values are printed on them eg 2003. I get about -0.59 V on the offset line and about 90 mV on the input. I suspect that this is because the ADC is not in operating mode. The offset line should be -5V for +/-10V input. Check the voltage on the offset line while the channel is switched on? However Channel, 2,3,4 all seem to work showing both positive and negative movement "In DataQ Software Only", in this software Channel 1, only shows positive trace movement, and, no negative. You could get this with failed resistors. Is the range 5V or 10V? I suspect that the ADC may have been 'modified' for a single polarity 5V signal? Can the friend who gave it to you provide any information? When I connected my Sensor to Channel 2,3 or 4 Using DataQ, I was thinking it would then work in AmaSeis, but it does not. It looks as if AmaSeis will not read any Channel except Channel 1. Even though in DataQ Channel 2,3,4 all seem to work fine. If I connect the sensor to Channel 3, AmaSeis shows a trace, but the trace does not move in either direction if I stimulate the sensor. This is true for Channel, 2,3,4. Only Channel 1, moves the trace in AmaSeis. I think you can change the com port, in AmaSeis, but is there anywhere you can or need to change for Channel selection? In DataQ I closed all the Channels except Ch. 3 and saved before closing. So If I were just using DataQ software, I would be operational. Amaseis normally uses CH1 only. However there are two setup files Amaseis.ini and AS1.ini. It may be possible to set a different channel by editing and then saving the file, but I am not sure. I know that you get your different sample rates this way. If you use a Dataq and Amaseis without editing the ini file, you just get 6 SPS. This information is taken from an old 8 bit DI-194 board, which I suspect that you have. Regards, Chris Chapman __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Info on Volksmeter....? From: "Geoffrey" gmvoeth@........... Date: Sun, 1 Apr 2007 14:50:59 -0700 I intend to call the company monday mst and see what they have to say. Since they post no prices I fear their attitude to be if you must ask you cant afford it. ----- Original Message ----- From: To: Sent: Saturday, March 31, 2007 01:25 Subject: Re: Info on Volksmeter....? > In a message dated 2007/03/31, mckimzey@........... writes: > >> I remain very interested in the "volksmeter"...but there has been little >> talk about it...only the PDF sheet on Larry's site. I did a web search, and >> >> there seems now to be a bit more information...and nice pictures! It was >> found at http://www.rllinstruments.com/ >> >> Does anyone have any more information? > > HI Mike, > > What further information do you want? > > Regards, > > Chris Chapman > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: My broken DataQ AD converter From: "tchannel" tchannel@.............. Date: Sun, 1 Apr 2007 16:06:18 -0600 Geoffrey, Good advise, indeed.... Thanks, Ted ----- Original Message ----- From: "Geoffrey" To: Sent: Sunday, April 01, 2007 3:38 PM Subject: Re: My broken DataQ AD converter > Someone who has reworked a PWB (printed wiring board) will most always > leave signs like scratch marks or noticibly different solder work. > Resistors will be cut and left in place rather than unsoldering them > because a PWB can only take so much heat before the foil starts > to peal away. No sense in doing unnecessary soldering. You must look > with a magnifying glass at the solder joints to make sure they are > well wetted and no fine hairs of conductive materials are where they > are not wanted. No resistor should ever be burnt or the board under them. > You really must have a schematic because the job of tracing out one > yourself > can be next to impossible. In past years the manufacturers would almost > always > provide schematics but today since most US industry has gone overseas > these forign places will refuse to let you get the schematic thill the > equipment > is old and obsolete. > It is not practicle for the common man to work on surface mounted > technology you > need to work on the new boards is expensive and medical like tools require > fine skills. > If you like electronics as a hobby it is best to go to a university and > become an engineer. > Technologist or if all else fails a Technician. > Without the proper tools throw the old one away and buy a new one. > You will waste your life/monies in trivial pursuits. > > > ----- Original Message ----- > From: "tchannel" > To: > Sent: Saturday, March 31, 2007 12:29 > Subject: Re: My broken DataQ AD converter > > > Well Chris, You did it again! I hope your head doesn't get too > big.....But facts are facts. From way over there, in the UK?, you were > able to help me fix this silly AD board, here in Boise Idaho, USA....... > > I do believe you were correct at every turn.... > > 1 I do think this is an older 194 8 bit board, from your physical > description. > 2 The resistor numbers on the surface mount components were 1003, and > 2003. Of course the two missing ones had no numbers. But there was a > pattern as the resistors were in a row, something like > 1003,2003,1003,2003,1003,2003,xxxx,2003, so I figured the xxxx was the > 1003, 100K > 3 The other missing resistor was near others which had the 2003, so I > figured the xxxx would be a 200K, the way it is built I could not see > where these resistors were in the circuit. I soldered in the two missing > resistors, and it is now working!!!!!!! > > 4 I did go to AmaSeis .ini files but did not see any "Channel # listed" > so maybe it is always going to be Channel 1. > and never Channel 2,3, or 4. > 5 I do think you are correct about someone modifying the board to run as > a +5v and a -0, as these two missing resistors just did not fail and fall > off, they look like they were purposely popped off, small scratch marks in > their place. > > Again, Many Thanks, Ted > > ----- Original Message ----- > From: ChrisAtUpw@....... > To: psn-l@.............. > Sent: Saturday, March 31, 2007 12:00 PM > Subject: Re: My broken DataQ AD converter > > > In a message dated 2007/03/31, tchannel@.............. writes: > > > Hi All, Looking closely at the board I see two resistors which are > "Open" "cracked" > Its a wonder it works at all, but some parts of it do work. Channel 1, > only puts out + voltage, just a small amount of - > I think that account for the AmaSeis trace showing only the top part of > an earthquake. > > > Hi Ted, > > The input resistors are two 200 K in series. The offset line is > 100 K to the centre point. If any of them are damaged, it should not be > difficult to replace them. Alternatively, could you unsolder the > resistors on CH4 and replace the ones on CH1? The resistor values are > printed on them eg 2003. > I get about -0.59 V on the offset line and about 90 mV on the > input. I suspect that this is because the ADC is not in operating mode. > The offset line should be -5V for +/-10V input. Check the voltage on the > offset line while the channel is switched on? > > > However Channel, 2,3,4 all seem to work showing both positive and > negative movement "In DataQ Software Only", in this software Channel 1, > only shows positive trace movement, and, no negative. > > > You could get this with failed resistors. Is the range 5V or 10V? > I suspect that the ADC may have been 'modified' for a single polarity 5V > signal? Can the friend who gave it to you provide any information? > > > When I connected my Sensor to Channel 2,3 or 4 Using DataQ, I was > thinking it would then work in AmaSeis, but it does not. It looks as if > AmaSeis will not read any Channel except Channel 1. Even though in DataQ > Channel 2,3,4 all seem to work fine. If I connect the sensor to Channel > 3, AmaSeis shows a trace, but the trace does not move in either direction > if I stimulate the sensor. This is true for Channel, 2,3,4. Only Channel > 1, moves the trace in AmaSeis. > I think you can change the com port, in AmaSeis, but is there anywhere > you can or need to change for Channel selection? > In DataQ I closed all the Channels except Ch. 3 and saved before > closing. So If I were just using DataQ software, I would be operational. > > > Amaseis normally uses CH1 only. However there are two setup files > Amaseis.ini and AS1.ini. It may be possible to set a different channel by > editing and then saving the file, but I am not sure. I know that you get > your different sample rates this way. If you use a Dataq and Amaseis > without editing the ini file, you just get 6 SPS. > > This information is taken from an old 8 bit DI-194 board, which I > suspect that you have. > > Regards, > > Chris Chapman > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with the body of the > message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: My broken DataQ AD converter From: ChrisAtUpw@....... Date: Sun, 1 Apr 2007 20:39:18 EDT In a message dated 2007/04/01, gmvoeth@........... writes: > It is not practicle for the common man to work on surface mounted > technology you > need to work on the new boards is expensive and medical like tools require > fine skills. > If you like electronics as a hobby it is best to go to a university and > become an engineer. Hi Geoff, The same was probably said when we changed from hard wiring valves to transistor PCBs !! Sure, you need the tools for the job and it hasn't get any easier with time. The first requirements are a temperature controlled soldering iron, a solder sucker, SS tweezers and a head mounted magnifying glass. I agree that 'taking a circuit diagram' can take a lot of time and effort, but it can be done. You may only need to look at part of the circuit. I look for the earth connection and the power supply rails first. Since when did a degree in engineering equip you to deal with PCB electronics? Regards, Chris Chapman In a me= ssage dated 2007/04/01, gmvoeth@........... writes:

It is not practicle for the com= mon man to work on surface mounted technology you
need to work on the new boards is expensive and medical like tools require f= ine skills.
If you like electronics as a hobby it is best to go to a university and beco= me an engineer.


Hi Geoff,

       The same was probably said when we chan= ged from hard wiring valves to transistor PCBs !!

       Sure, you need the tools for the job an= d it hasn't get any easier with time. The first requirements are a temperatu= re controlled soldering iron, a solder sucker, SS tweezers and a head mounte= d magnifying glass.

       I agree that 'taking a circuit diagram'= can take a lot of time and effort, but it can be done. You may only need to= look at part of the circuit. I look for the earth connection and the power=20= supply rails first.

       Since when did a degree in engineering=20= equip you to deal with PCB electronics?

       Regards,

       Chris Chapman
 Subject: RE: My broken DataQ AD converter From: "Keith Payea" kpayea@........... Date: Sun, 1 Apr 2007 20:15:41 -0700 I must respectfully disagree with your statement about handling SMT boards. I, too, learned to solder by dis-assembling old tube (valve) radios, and building "Heath Kits" during the 70's. As technology marched on, I had to learn how to deal with smaller and smaller parts. I distinctly remember cartoons in the electronics hobbyist magazines of that era making fun of the tiny parts and losing them on the workbench. I'm sure they were talking about nothing smaller than 2N3904 transistors in TO-92 packages. I have typical 50 year old eyes and shaky hands, but I have successfully built and reworked many boards with 0402 SMT resistors and caps. While there are a few tools you need to work on SMT pc boards, they are neither hard to find nor expensive. Most electronics catalogs/websites have a decent soldering iron with a tip small enough to do the job. If you already have something better than a Radio Shack wood burner, you may be able to get a finer tip for a few bucks. Buy a roll or two of solder wick while you are at it and save your solder sucker for the big jobs. The way I install fine pitch, 100 pin ICs is to glob on the solder and then remove the excess with solder wick. One trick I use is to buy a pair of "drug store" reading glasses that are more powerful than the ones I use for just reading. For really tough jobs, I combine these with a magnifying lamp I got from Harbor Freight Tools. I would never buy their stuff through a catalog, without seeing it in person, but their magnifying lamp with flourescent lamp is a pretty good unit. Good tweezers can be found in the cosmetics section of most drug stores too. If the tip isn't fine enough, take a file and/or sandpaper to them. There are tons of tutorials on-line, complete with videos to show you how to do deal with small SMT parts. Here's a link to a pretty good one: http://www.epemag.wimborne.co.uk/solderfaq.htm I also highly recommend "MAKE" Magazine: www.makezine.com. I subscribe to their print and online versions. Oh, and lay off the quadruple latte's if you need to do some fine soldering work! I have to wait for the caffiene to wear off before I do any really fussy work.... Good Luck! Keith -----Original Message----- From: psn-l-request@.............. [mailto:psn-l-request@............... On Behalf Of Geoffrey Sent: Sunday, April 01, 2007 2:38 PM To: psn-l@.............. Subject: Re: My broken DataQ AD converter Someone who has reworked a PWB (printed wiring board) will most always leave signs like scratch marks or noticibly different solder work. Resistors will be cut and left in place rather than unsoldering them because a PWB can only take so much heat before the foil starts to peal away. No sense in doing unnecessary soldering. You must look with a magnifying glass at the solder joints to make sure they are well wetted and no fine hairs of conductive materials are where they are not wanted. No resistor should ever be burnt or the board under them. You really must have a schematic because the job of tracing out one yourself can be next to impossible. In past years the manufacturers would almost always provide schematics but today since most US industry has gone overseas these forign places will refuse to let you get the schematic thill the equipment is old and obsolete. It is not practicle for the common man to work on surface mounted technology you need to work on the new boards is expensive and medical like tools require fine skills. If you like electronics as a hobby it is best to go to a university and become an engineer. Technologist or if all else fails a Technician. Without the proper tools throw the old one away and buy a new one. You will waste your life/monies in trivial pursuits. ----- Original Message ----- From: "tchannel" To: Sent: Saturday, March 31, 2007 12:29 Subject: Re: My broken DataQ AD converter Well Chris, You did it again! I hope your head doesn't get too big.....But facts are facts. From way over there, in the UK?, you were able to help me fix this silly AD board, here in Boise Idaho, USA....... I do believe you were correct at every turn.... 1 I do think this is an older 194 8 bit board, from your physical description. 2 The resistor numbers on the surface mount components were 1003, and 2003. Of course the two missing ones had no numbers. But there was a pattern as the resistors were in a row, something like 1003,2003,1003,2003,1003,2003,xxxx,2003, so I figured the xxxx was the 1003, 100K 3 The other missing resistor was near others which had the 2003, so I figured the xxxx would be a 200K, the way it is built I could not see where these resistors were in the circuit. I soldered in the two missing resistors, and it is now working!!!!!!! 4 I did go to AmaSeis .ini files but did not see any "Channel # listed" so maybe it is always going to be Channel 1. and never Channel 2,3, or 4. 5 I do think you are correct about someone modifying the board to run as a +5v and a -0, as these two missing resistors just did not fail and fall off, they look like they were purposely popped off, small scratch marks in their place. Again, Many Thanks, Ted ----- Original Message ----- From: ChrisAtUpw@....... To: psn-l@.............. Sent: Saturday, March 31, 2007 12:00 PM Subject: Re: My broken DataQ AD converter In a message dated 2007/03/31, tchannel@.............. writes: Hi All, Looking closely at the board I see two resistors which are "Open" "cracked" Its a wonder it works at all, but some parts of it do work. Channel 1, only puts out + voltage, just a small amount of - I think that account for the AmaSeis trace showing only the top part of an earthquake. Hi Ted, The input resistors are two 200 K in series. The offset line is 100 K to the centre point. If any of them are damaged, it should not be difficult to replace them. Alternatively, could you unsolder the resistors on CH4 and replace the ones on CH1? The resistor values are printed on them eg 2003. I get about -0.59 V on the offset line and about 90 mV on the input. I suspect that this is because the ADC is not in operating mode. The offset line should be -5V for +/-10V input. Check the voltage on the offset line while the channel is switched on? However Channel, 2,3,4 all seem to work showing both positive and negative movement "In DataQ Software Only", in this software Channel 1, only shows positive trace movement, and, no negative. You could get this with failed resistors. Is the range 5V or 10V? I suspect that the ADC may have been 'modified' for a single polarity 5V signal? Can the friend who gave it to you provide any information? When I connected my Sensor to Channel 2,3 or 4 Using DataQ, I was thinking it would then work in AmaSeis, but it does not. It looks as if AmaSeis will not read any Channel except Channel 1. Even though in DataQ Channel 2,3,4 all seem to work fine. If I connect the sensor to Channel 3, AmaSeis shows a trace, but the trace does not move in either direction if I stimulate the sensor. This is true for Channel, 2,3,4. Only Channel 1, moves the trace in AmaSeis. I think you can change the com port, in AmaSeis, but is there anywhere you can or need to change for Channel selection? In DataQ I closed all the Channels except Ch. 3 and saved before closing. So If I were just using DataQ software, I would be operational. Amaseis normally uses CH1 only. However there are two setup files Amaseis.ini and AS1.ini. It may be possible to set a different channel by editing and then saving the file, but I am not sure. I know that you get your different sample rates this way. If you use a Dataq and Amaseis without editing the ini file, you just get 6 SPS. This information is taken from an old 8 bit DI-194 board, which I suspect that you have. Regards, Chris Chapman __________________________________________________________ Public Seismic Network Mailing List (PSN-L) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Large earthquake near Solomon Islands From: "Dale Hardy" photon1@........... Date: Tue, 3 Apr 2007 09:55:07 +1000 According to Red Puma, 59 EQ's >5.0 in the Solomons in the last few days, definitely not a place to be, however am getting good traces on my Lehman http://www.daleh.id.au/Current_Lehman_trace.GIF regards Dale To: Sent: Monday, April 02, 2007 5:55 PM Subject: Re: Large earthquake near Solomon Islands > According to Red Puma, 59 EQ's >5.0 in the Solomons in the last few days, > definitely not a place to be, however > am getting good traces on my Lehman > http://www.daleh.id.au/Current_Lehman_trace.GIF > regards > Dale > > > > Solomon Islands. But based on how the earthquake is appearing on plots > around the world, I assume it is at least 0.5 magnitude bigger then > automatic system assume. > > Regards. > -- > Jón Frímann > http://www.jonfr.com > http://www.simnet.is/jonfr500/earthquake/ > > __________________________________________________________ > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with the body of the > message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Large earthquake near Solomon Islands From: "Dale Hardy" photon1@........... Date: Tue, 3 Apr 2007 11:27:58 +1000 Thanks Ted, I am located near Newcastle NSW Australia, some 2800km from the Solomons Dale ----- Original Message ----- From: "tchannel" To: Sent: Tuesday, April 03, 2007 10:21 AM Subject: Re: Large earthquake near Solomon Islands > Hi Dale, Very impressive, where are you located? Thanks, Ted in Idaho > > > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: My broken DataQ AD converter From: ChrisAtUpw@....... Date: Mon, 2 Apr 2007 22:40:18 EDT In a message dated 2007/04/02, kpayea@........... writes: > While there are a few tools you need to work on SMT pc boards, they are > neither hard to find nor expensive. Most electronics catalogs/websites have > a decent soldering iron with a tip small enough to do the job. Buy a roll > or two of solder wick while you are at it and save your solder sucker for the > big jobs. Hi Keith, It can also be useful to get strips of 2 thou SS foil off an old shaver, or an old SS razor blade. You can heat the solder joint and slide the foil in between the component and the board to unsolder the joint. SS tweezers are also fairly essential. Regards, Chris Chapman In a me= ssage dated 2007/04/02, kpayea@........... writes:

While there are a few tools you= need to work on SMT pc boards, they are
neither hard to find nor expensive.  Most electronics catalogs/websites= have
a decent soldering iron with a tip small enough to do the job.  Buy a r= oll or two of solder wick while you are at it and save your solder sucker fo= r the big jobs.


Hi Keith,

       It can also be useful to get strips of=20= 2 thou SS foil off an old shaver, or an old SS razor blade. You can heat the= solder joint and slide the foil in between the component and the board to u= nsolder the joint. SS tweezers are also fairly essential.

       Regards,

       Chris Chapman Subject: Re: Large earthquake near Solomon Islands From: "Michael Kimzey" mckimzey@........... Date: Mon, 02 Apr 2007 22:41:58 -0400 There sure is a lot of activity! ...where there are usually circles on the IRIS map...around the Solomons there is just one big red circle. -Mike __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Large earthquake near Solomon Islands From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Tue, 03 Apr 2007 20:52:13 +0000 Hi all Besides all the aftershocks, the event appears to have sparked many earthquakes in nearby areas, many of them in mag 5.5 range or stronger. Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Volksmeter.... From: ChrisAtUpw@....... Date: Tue, 3 Apr 2007 20:51:51 EDT In a message dated 2007/03/31, mckimzey@........... writes: > I had been waiting (like a kid at Christmas!) for some info on Larry's site > (he said that there would be more info around February) but I'm sure he is > busy. I'll probably > just give a call some time this week now that there is a phone number. > Thanks for the feedback. Hi Mike, The current (introductory) price of a 2-channel VolksMeter (model VMII-RU2) is US$1495.00. The GPS Time Standard option (VMII-GPS) is US$125.00. The universal AC power supply (VMII-UACA) is US$35.00 (now includes UK and EU AC adapter plugs) Time to raid your 'piggy bank' ! ! Regards, Chris Chapman In a me= ssage dated 2007/03/31, mckimzey@........... writes:

I had been waiting (like a kid=20= at Christmas!) for some info on Larry's site (he said that there would be mo= re info around February) but I'm sure he is busy.  I'll probably
just give a call  some time this week now that there is a phone number.=  
Thanks for the feedback.


Hi Mike,

       The current (introductory) price of a 2= -channel VolksMeter (model VMII-RU2) is US$1495.00.  The GPS Time Stand= ard option (VMII-GPS) is US$125.00.  The universal AC power supply (VMI= I-UACA) is US$35.00 (now includes UK and EU AC adapter plugs)

       Time to raid your 'piggy bank' ! !

       Regards,

       Chris Chapman

       Subject: Re: Large earthquake near Solomon Islands From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Wed, 04 Apr 2007 02:00:00 +0000 Hi all I have added a seismic station that USGS has a plot on from Solomon islands on my USGS plot webpage. The plot can be seen here. http://www.simnet.is/jonfr500/earthquake/tremorusgsen.htm Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Volksmeter.... From: "Michael Kimzey" mckimzey@........... Date: Tue, 03 Apr 2007 23:08:12 -0400 Thanks for the update Chris. I actually wrote to Les LaZar and received the full 'draft' info sheet. I just may raid the piggy bank. Here are some questions and musings to the list, though... In the grand scheme of things, where does the Volksmeter fit? Certainly, a beginner starts with the AS1 or Lehman (I have constructed both). Is the next step an SG? How does the Volksmeter compare to a STM-8 that is homebuilt? Or even to some of the sensors that Mr. Allan Coleman has made? The info sheet states that the Volksmeter compares favorably (although a tab less sensitive...and expensive) to a STS-1, which, I guess, is one of the _de facto_ standards. I've read through the very nice PDF on the Volksmeter at Larry's site, but I will admit that some of the information has gone over my head. (Anyone else lost on some of the diagrams?) If I can't understand all of it, wound (or should) that preclude someone (me) from purchasing such a system? Maybe I'm just thinking way too much, but certainly the dollar amount would warrant it. - Mike __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re:webpage From: "Michael Kimzey" mckimzey@........... Date: Tue, 03 Apr 2007 23:22:14 -0400 Jon, I updated my site a little and my new plots are named mk1.gif and mk2.gif. You may need to update your page. http://mckimzey.homeip.net:8080/seismometer/mk1.gif http://mckimzey.homeip.net:8080/seismometer/mk2.gif As you can see from my other post, I'm thinking about the Volksmeter. If I get one, I'll let you know about those links also. Regards, - Mike Kimzey __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: GPS Based frequency reference From: Philip Schmidt pgschmidt@............... Date: Wed, 04 Apr 2007 21:18:52 +0930 Hello All Last month a Australian electronics magazine called Silicon Chip published the first of a two part article on a GPS-Based Frequency reference. I am not sure if it would come in handy to people on the list however at the very least I though it should get a mention. The article is available on line to purchase. An introduction is available to view at the following link http://www.siliconchip.com.au/cms/A_108508/article.html Hope it comes in handy to someone out there. Cheers Philip Schmidt __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Solomon Islands From: "Dale Hardy" photon1@........... Date: Wed, 4 Apr 2007 21:56:51 +1000 Another earthquake is occurring at the moment at the Loyalty Islands, = making 3 days of extreme activity in the area, does anyone know of = previous events comparable to this 'swarm', currently 12 earthquakes on = my Amaseis screen Dale
Another earthquake is occurring at the = moment at=20 the Loyalty Islands, making 3 days of extreme activity in the area, does = anyone=20 know of previous events comparable to this 'swarm', currently 12 = earthquakes on=20 my Amaseis screen
Dale
Subject: Re: Solomon Islands From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Wed, 04 Apr 2007 12:52:26 +0000 Hi I don't know about any comparision to this earthquake aftershock activite. But I do think that the area did be come unstable when the area was struck by mag 8.1 earthquake. At current rate it is going to be a long time until it slows down agen. Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Solomon Islands From: Stephen & Kathy skmort@............ Date: Wed, 04 Apr 2007 09:19:56 -0700 I did a look up for 6+ events for the 2004 Sumatra quake and found 14 within about 48 hours! My count of 6+ events for this swarm is 9 within 48 hours! I was unable to find complete data for the 1960 Chile, and 1964 Alaska quakes???? Stephen PSN Station #55 Dale Hardy wrote: > Another earthquake is occurring at the moment at the Loyalty Islands, > making 3 days of extreme activity in the area, does anyone know of > previous events comparable to this 'swarm', currently 12 earthquakes > on my Amaseis screen > Dale I did a look up for 6+ events for the 2004 Sumatra quake and found 14 within about 48 hours!   My count of 6+ events for this swarm is 9 within 48 hours!    I was unable to find complete data for the 1960 Chile, and 1964 Alaska quakes????
  Stephen
  PSN Station #55
 

Dale Hardy wrote:
Another earthquake is occurring at the moment at the Loyalty Islands, making 3 days of extreme activity in the area, does anyone know of previous events comparable to this 'swarm', currently 12 earthquakes on my Amaseis screen
Dale
Subject: Tiltmeter progress From: George Bush ke6pxp@....... Date: Wed, 04 Apr 2007 10:01:45 -0700 Chris- I wanted to report on my recent activity with the tiltmeter (NOT the tiltometer!). Your last comment to me about the Linear LTC1043 circuit going unstable if the Cx is smaller than the Cref has opened a door and I am now proceeding. Knowing that the circuit was working was of great value and I stopped trouble-shooting and have attached the circuit to the tiltmeter yesterday! The instrument is amazingly stable, no apparent noise on the scope, no sensitivity to moving my hands near the un-shielded Hg pots and it seems to just simply work. I did a simple sensitivy check. The plate the two pots are mounted on is supported by screws in a triangle configuration (see http://ntweb.mcn.org/gbush/Tiltmeter/Construction/Construction.html). The pots are separated by 24" center-to-center, and the micrometer leveller leg is separated from the other end two suppoort screws by 27 1/2". When I adjusted the micrometer by .01" vertically, I got an output voltage change reading of 0.193v. If my trig is correct this is the voltage change for a tilt change of 6.347 -07 deg. I have no feeling if this is getting into the ball-park of sensitivity needed to detect Earth tides. What sensitivity do you think is needed? Since yesterday afternoon I have periodically recorded output voltage and time. This is the signal so far: Date Time Vout ---- ---- ---- 3-4-07 1:21p 1.625 3:45p 1.594 5:27p 1.605 6:30p 1.615 4-4-07 9:29a 1.654 Presently I am connecting the instrument to my Windaq DI-194 to try to plot daily signal variations. Then I will be able to see if I need to add another stage of gain. After that, a complete mechanical tear-down to shield the Hg cups and connecting tube and to build an insulated enclosure with a heater in the top. I can see light at the end of the tunnel and am really geting excited! George __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Tiltmeter progress From: "tchannel" tchannel@.............. Date: Wed, 4 Apr 2007 11:59:14 -0600 Hi George, This is interesting. Where can I find articles to read more about the basic principle. etc. Thanks, Ted ----- Original Message ----- From: "George Bush" To: Sent: Wednesday, April 04, 2007 11:01 AM Subject: Tiltmeter progress > Chris- > > I wanted to report on my recent activity with the tiltmeter (NOT the > tiltometer!). > > Your last comment to me about the Linear LTC1043 circuit going unstable if > the Cx is smaller than the Cref has opened a door and I am now proceeding. > Knowing that the circuit was working was of great value and I stopped > trouble-shooting and have attached the circuit to the tiltmeter yesterday! > The instrument is amazingly stable, no apparent noise on the scope, no > sensitivity to moving my hands near the un-shielded Hg pots and it seems > to > just simply work. > > I did a simple sensitivy check. The plate the two pots are mounted on is > supported by screws in a triangle configuration (see > http://ntweb.mcn.org/gbush/Tiltmeter/Construction/Construction.html). > The pots are separated by 24" center-to-center, and the micrometer > leveller > leg is separated from the other end two suppoort screws by 27 1/2". When I > adjusted the micrometer by .01" vertically, I got an output voltage change > reading of 0.193v. If my trig is correct this is the voltage change for a > tilt change of 6.347 -07 deg. I have no feeling if this is getting into > the > ball-park of sensitivity needed to detect Earth tides. What sensitivity do > you think is needed? > > Since yesterday afternoon I have periodically recorded output voltage and > time. This is the signal so far: > > Date Time Vout > ---- ---- ---- > 3-4-07 1:21p 1.625 > 3:45p 1.594 > 5:27p 1.605 > 6:30p 1.615 > 4-4-07 9:29a 1.654 > > Presently I am connecting the instrument to my Windaq DI-194 to try to > plot > daily signal variations. Then I will be able to see if I need to add > another stage of gain. After that, a complete mechanical tear-down to > shield the Hg cups and connecting tube and to build an insulated enclosure > with a heater in the top. > > I can see light at the end of the tunnel and am really geting excited! > > > George > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Tiltmeter progress From: ChrisAtUpw@....... Date: Wed, 4 Apr 2007 17:54:23 EDT In a message dated 2007/04/07, tchannel@.............. writes: > Hi George, This is interesting. Where can I find articles to read more > about the basic principle. etc. Hi Ted, See http://ntweb.mcn.org/gbush/Tiltmeter/tiltmeter%20Main.html for several references. This tiltmeter has two Perspex cups 2 ft apart on a baseplate, connected by plastic tube and part filled with Mercury. Two flat plates are suspended just above the Hg surfaces to form capacitative level detectors. The cup system is sealed to contain the Hg vapour, which is very poisonous and attacks electronic components, Cu wire, pcbs etc like fun. The original SciAm circuit used valves, a crystal oscillator and resonant tuned detectors followed by diode rectifiers. The oscillating voltages were quite high. The Nuts and Volts version was an adaptation of this to semiconductors, with lower voltages. The new N&V board seemed to suffer from AC hum from the on board PSU. A major problem with the whole concept is that the foreward voltage of rectifier diodes drifts by about 2.5 mV / C deg and the resonant circuits also drift with temperarure. So, unless you are very determined, you may end up with an expensive differential thermometer sensitive to random air movements and to any stray capacitance going. The work/satisfaction ratio may be discouraging. A good way around this ''problem'' is to redesign the circuit using a capacitative detector working at high audio frequencies, not at RF and to provide a FET phase sensitive detector. The LTC1043 IC has all the switching components on it. You can use the on chip oscillator, but I found that an external Crystal oscillator gave significantly better results. I used a 2.4576 M Hz AT cut crystal in a 4060 oscillator divider circuit, giving a 9.6 kHz drive. If you want to sense only earth tides and similar, severely damping the Hg flow will tend to reject any passing earthquakes, local delivery trucks, etc. Clamp a piece of cleaned iron wire centrally in the plastic tube containing the Hg, using an external clamp maybe 1" wide. Hg 'wets' the iron, but does not dissolve it, leaving two narrow triangular passages bounded by the plastic and the wire. Regards, Chris Chapman In a me= ssage dated 2007/04/07, tchannel@.............. writes:

Hi George,  This is intere= sting.  Where can I find articles to read more
about the basic principle. etc.


Hi Ted,

       See http://ntweb.mcn.org/gbush/Tiltmete= r/tiltmeter%20Main.html for several references.
       This tiltmeter has two Perspex cups 2 f= t apart on a baseplate, connected by plastic tube and part filled with Mercu= ry. Two flat plates are suspended just above the Hg surfaces to form capacit= ative level detectors. The cup system is sealed to contain the Hg vapour, wh= ich is very poisonous and attacks electronic components, Cu wire, pcbs etc l= ike fun.
       The original SciAm circuit used valves,= a crystal oscillator and resonant tuned detectors followed by diode rectifi= ers. The oscillating voltages were quite high. The Nuts and Volts version wa= s an adaptation of this to semiconductors, with lower voltages. The new N&am= p;V board seemed to suffer from AC hum from the on board PSU. A major proble= m with the whole concept is that the foreward voltage of rectifier diodes dr= ifts by about 2.5 mV / C deg and the resonant circuits also drift with tempe= rarure. So, unless you are very determined, you may end up with an expensive= differential thermometer sensitive to random air movements and to any stray= capacitance going. The work/satisfaction ratio may be discouraging.
       A good way around this ''problem'' is t= o redesign the circuit using a capacitative detector working at high audio f= requencies, not at RF and to provide a FET phase sensitive detector. The LTC= 1043 IC has all the switching components on it. You can use the on chip osci= llator, but I found that an external Crystal oscillator gave significantly b= etter results. I used a 2.4576 M Hz AT cut crystal in a 4060 oscillator divi= der circuit, giving a 9.6 kHz drive.
       If you want to sense only earth tides a= nd similar, severely damping the Hg flow will tend to reject any passing ear= thquakes, local delivery trucks, etc. Clamp a piece of cleaned iron wire cen= trally in the plastic tube containing the Hg, using an external clamp maybe=20= 1" wide. Hg 'wets' the iron, but does not dissolve it, leaving two narrow tr= iangular passages bounded by the plastic and the wire.

       Regards,

       Chris Chapman Subject: Re: Tiltmeter progress From: George Bush ke6pxp@....... Date: Wed, 04 Apr 2007 15:44:23 -0700 Ted- I want to apologize to you and the list for sending a message for Chris Chapman to the whole list (I just hit reply without seeing who it was replying to). I have been interested in Earth tides and have wanted to make an instrument to measure them. C. L. Strong originally had an article on making a tiltmeter based on two mercury-filled cups connected by a tube and measuring the level by a capacitance gauge, "A sensitive mercury tiltmeter that serves as a seismometer" Scientific American, November 1973, pp. 124-129. The electronics were updated by an article in Nuts & Volts by Ron Newton, "Measure Earth Tides with a Tiltometer" I ordered a board from Ron, but was unable to make it work. I have just completed a circuit suggested by Chris based on the Linear Technology LTC 1043 chip and the email to Chris was to let him know how it was working. Check my website at http://ntweb.mcn.org/gbush/Tiltmeter/tiltmeter%20Main.html for further info on my project and references. At 11:59 AM 4/4/2007 -0600, you wrote: >Hi George, This is interesting. Where can I find articles to read more >about the basic principle. etc. Thanks, Ted ....snip... George __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Tiltmeter progress From: "tchannel" tchannel@.............. Date: Wed, 4 Apr 2007 16:55:02 -0600 Hi George, Thanks for the reply, to me this is great stuff, new to me. How is it working for you? Do you have a larger picture of the unit as illustrated at the top of you wed page? I can't see it very well. Thanks, Ted ----- Original Message ----- From: "George Bush" To: Sent: Wednesday, April 04, 2007 4:44 PM Subject: Re: Tiltmeter progress > Ted- > > I want to apologize to you and the list for sending a message for Chris > Chapman to the whole list (I just hit reply without seeing who it was > replying to). I have been interested in Earth tides and have wanted to > make > an instrument to measure them. C. L. Strong originally had an article on > making a tiltmeter based on two mercury-filled cups connected by a tube > and > measuring the level by a capacitance gauge, "A sensitive mercury tiltmeter > that serves as a seismometer" Scientific American, November 1973, pp. > 124-129. The electronics were updated by an article in Nuts & Volts by Ron > Newton, "Measure Earth Tides with a Tiltometer" I ordered a board from > Ron, > but was unable to make it work. I have just completed a circuit suggested > by Chris based on the Linear Technology LTC 1043 chip and the email to > Chris was to let him know how it was working. > > Check my website at > http://ntweb.mcn.org/gbush/Tiltmeter/tiltmeter%20Main.html > for further info on my project and references. > > At 11:59 AM 4/4/2007 -0600, you wrote: >>Hi George, This is interesting. Where can I find articles to read more >>about the basic principle. etc. Thanks, Ted > ...snip... > George > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Tiltmeter progress From: "tchannel" tchannel@.............. Date: Wed, 4 Apr 2007 17:03:06 -0600 Hi Chris, Thanks for the explanation. Have they also use lasers, in = such devises? Ted ----- Original Message -----=20 From: ChrisAtUpw@.......... To: psn-l@................. Sent: Wednesday, April 04, 2007 3:54 PM Subject: Re: Tiltmeter progress In a message dated 2007/04/07, tchannel@.............. writes: Hi George, This is interesting. Where can I find articles to read = more=20 about the basic principle. etc.=20 Hi Ted, See http://ntweb.mcn.org/gbush/Tiltmeter/tiltmeter%20Main.html = for several references. This tiltmeter has two Perspex cups 2 ft apart on a baseplate, = connected by plastic tube and part filled with Mercury. Two flat plates = are suspended just above the Hg surfaces to form capacitative level = detectors. The cup system is sealed to contain the Hg vapour, which is = very poisonous and attacks electronic components, Cu wire, pcbs etc like = fun. The original SciAm circuit used valves, a crystal oscillator = and resonant tuned detectors followed by diode rectifiers. The = oscillating voltages were quite high. The Nuts and Volts version was an = adaptation of this to semiconductors, with lower voltages. The new N&V = board seemed to suffer from AC hum from the on board PSU. A major = problem with the whole concept is that the foreward voltage of rectifier = diodes drifts by about 2.5 mV / C deg and the resonant circuits also = drift with temperarure. So, unless you are very determined, you may end = up with an expensive differential thermometer sensitive to random air = movements and to any stray capacitance going. The work/satisfaction = ratio may be discouraging. A good way around this ''problem'' is to redesign the circuit = using a capacitative detector working at high audio frequencies, not at = RF and to provide a FET phase sensitive detector. The LTC1043 IC has all = the switching components on it. You can use the on chip oscillator, but = I found that an external Crystal oscillator gave significantly better = results. I used a 2.4576 M Hz AT cut crystal in a 4060 oscillator = divider circuit, giving a 9.6 kHz drive.=20 If you want to sense only earth tides and similar, severely = damping the Hg flow will tend to reject any passing earthquakes, local = delivery trucks, etc. Clamp a piece of cleaned iron wire centrally in = the plastic tube containing the Hg, using an external clamp maybe 1" = wide. Hg 'wets' the iron, but does not dissolve it, leaving two narrow = triangular passages bounded by the plastic and the wire. Regards, Chris Chapman
Hi Chris,  Thanks for the = explanation. =20 Have they also use lasers, in such devises?   Ted
----- Original Message -----
From:=20 ChrisAtUpw@.......
Sent: Wednesday, April 04, 2007 = 3:54=20 PM
Subject: Re: Tiltmeter = progress

In a=20 message dated 2007/04/07, tchannel@..............=20 writes:

Hi George,  This is interesting.  Where can I = find=20 articles to read more
about the basic principle. etc.=20

Hi = Ted,

       See=20 http:= //ntweb.mcn.org/gbush/Tiltmeter/tiltmeter%20Main.html=20 for several references.
       This = tiltmeter=20 has two Perspex cups 2 ft apart on a baseplate, connected by plastic = tube and=20 part filled with Mercury. Two flat plates are suspended just above the = Hg=20 surfaces to form capacitative level detectors. The cup system is = sealed to=20 contain the Hg vapour, which is very poisonous and attacks electronic=20 components, Cu wire, pcbs etc like=20 fun.
       The original SciAm = circuit used=20 valves, a crystal oscillator and resonant tuned detectors followed by = diode=20 rectifiers. The oscillating voltages were quite high. The Nuts and = Volts=20 version was an adaptation of this to semiconductors, with lower = voltages. The=20 new N&V board seemed to suffer from AC hum from the on board PSU. = A major=20 problem with the whole concept is that the foreward voltage of = rectifier=20 diodes drifts by about 2.5 mV / C deg and the resonant circuits also = drift=20 with temperarure. So, unless you are very determined, you may end up = with an=20 expensive differential thermometer sensitive to random air movements = and to=20 any stray capacitance going. The work/satisfaction ratio may be=20 discouraging.
       A good way = around this=20 ''problem'' is to redesign the circuit using a capacitative detector = working=20 at high audio frequencies, not at RF and to provide a FET phase = sensitive=20 detector. The LTC1043 IC has all the switching components on it. You = can use=20 the on chip oscillator, but I found that an external Crystal = oscillator gave=20 significantly better results. I used a 2.4576 M Hz AT cut crystal in a = 4060=20 oscillator divider circuit, giving a 9.6 kHz drive.=20
       If you want to sense only = earth tides=20 and similar, severely damping the Hg flow will tend to reject any = passing=20 earthquakes, local delivery trucks, etc. Clamp a piece of cleaned iron = wire=20 centrally in the plastic tube containing the Hg, using an external = clamp maybe=20 1" wide. Hg 'wets' the iron, but does not dissolve it, leaving two = narrow=20 triangular passages bounded by the plastic and the=20 wire.

      =20 Regards,

       Chris = Chapman=20 Subject: Re: Tiltmeter progress From: ChrisAtUpw@....... Date: Wed, 4 Apr 2007 20:54:56 EDT In a message dated 2007/04/05, tchannel@.............. writes: > Hi Chris, Thanks for the explanation. Have they also use lasers, in such > devises? Ted Hi Ted, Lasers have been used, but I don't know how successfully. In seismic applications you tend to be limited by 1/2 the wavelength of light for fringe counting - a step size of say ~0.3 micron = large. Fringe counting may sound simple, but it is not a 'cheap and easy technique'. Your average microseism may be ~2 microns. You want to measure seismic movements down to nano metres. Measuring to 1/100 of a wavelength tends to be very costly. Especially when a small filament bulb and a couple of Si photocells can give you an optical sensor with a noise level <15 nano metres! The intensity stability of semiconductor lasers in my experience is lousy. The huge open trough tiltmeters in Washington State use floats with 'free armature' LVDT magnetic sensors. See http://www.geodesy.cwu.edu/tilt/ The smaller ones at Walferdange use capacitative sensors of at least two types. There are also small bubble tiltmeters, which use AC fluid resistance measurement, but they do not have such a high resolution. They tend to be used for monitoring the tilts of buildings, bridges, roads, etc. See several des criptions at http://www.geomechanics.com/bibliography.cfm The Earth Tide tilts may be ~0.25 micro radian = 1/4 mm at 1 km = not very large. Regards, Chris Chapman In a me= ssage dated 2007/04/05, tchannel@.............. writes:

Hi Chris,  Thanks for the=20= explanation.  Have they also use lasers, in such devises?   T= ed


Hi Ted,

       Lasers have been used, but I don't know= how successfully. In seismic applications you tend to be limited by 1/2 the= wavelength of light for fringe counting - a step size of say ~0.3 micron=20= =3D large. Fringe counting may sound simple, but it is not a 'cheap and easy= technique'. Your average microseism may be ~2 microns. You want to measure=20= seismic movements down to nano metres. Measuring to 1/100 of a wavelength te= nds to be very costly. Especially when a small filament bulb and a couple of= Si photocells can give you an optical sensor with a noise level <15 nano= metres! The intensity stability of semiconductor lasers in my experience is= lousy.
       The huge open trough tiltmeters in Wash= ington State use floats with 'free armature' LVDT magnetic sensors. See http= ://www.geodesy.cwu.edu/tilt/  
       The smaller ones at Walferdange use cap= acitative sensors of at least two types. There are also small bubble tiltmet= ers, which use AC fluid resistance measurement, but they do not have such a=20= high resolution. They tend to be used for monitoring the tilts of buildings,= bridges, roads, etc. See several descriptions at http://www.geomechanics.co= m/bibliography.cfm
       The Earth Tide tilts may be ~0.25 micro= radian =3D 1/4 mm at 1 km =3D not very large.

       Regards,

       Chris Chapman Subject: Re: Tiltmeter designs From: George Bush ke6pxp@....... Date: Thu, 05 Apr 2007 09:57:01 -0700 Ted- The picture on the top of my website was from the Scientific American article I mentioned below. On my web you can see what my instrument looks like. My approach may not be the best route. I have been following the work of the FMES group (http://groups.yahoo.com/group/fmes) and the instrument designed by Dave Nelson (davefnelson@........ that is based on the resistance of water in a similar two-cup configuration. He uses circuits with hi-pass coupling, and I was wondering if dc-coupled circuits could possibly be used to detect earth tides? I am concentrating on getting my system working, but it might be fun if someone else wanted to look in to modifying Dave's instrument for ultra-low freq operation. Thank you for your interest. At 04:55 PM 4/4/2007 -0600, you wrote: >Hi George, Thanks for the reply, to me this is great stuff, new to me. > >How is it working for you? Do you have a larger picture of the unit as >illustrated at the top of you wed page? >I can't see it very well. Thanks, Ted > > > >----- Original Message ----- >From: "George Bush" >To: >Sent: Wednesday, April 04, 2007 4:44 PM >Subject: Re: Tiltmeter progress > > >> Ted- >> >> I want to apologize to you and the list for sending a message for Chris >> Chapman to the whole list (I just hit reply without seeing who it was >> replying to). I have been interested in Earth tides and have wanted to >> make >> an instrument to measure them. C. L. Strong originally had an article on >> making a tiltmeter based on two mercury-filled cups connected by a tube >> and >> measuring the level by a capacitance gauge, "A sensitive mercury tiltmeter >> that serves as a seismometer" Scientific American, November 1973, pp. >> 124-129. The electronics were updated by an article in Nuts & Volts by Ron >> Newton, "Measure Earth Tides with a Tiltometer" I ordered a board from >> Ron, >> but was unable to make it work. I have just completed a circuit suggested >> by Chris based on the Linear Technology LTC 1043 chip and the email to >> Chris was to let him know how it was working. >> >> Check my website at >> http://ntweb.mcn.org/gbush/Tiltmeter/tiltmeter%20Main.html >> for further info on my project and references. >> >> ...snip... > George __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: GPS and solarflairs From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Fri, 06 Apr 2007 00:18:10 +0000 Hi all I want to point out artical about solar flairs and how they can disrupt a gps signal.=20 http://www.reghardware.co.uk/2007/04/05/solar_flares_zap_gps/ It is worth tracking solar flares since most of us recording earthquakes use gps to keep track of time. Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: My broken DataQ AD converter From: "Geoffrey" gmvoeth@........... Date: Fri, 6 Apr 2007 18:00:31 -0700 Personal experience has shown me only factories are properly equipped and funded to handle modern day electronics. The small business peoples and private individuals usually are not properly trained to do these things. It is mainly my personal preference speaking here. The only exception I make are with Engineering techs who make models for Engineers that have not yet been put into production. Unless they use special tools just about anyone with previous experience in the field should be able to reproduce and work on their designs. But as for final products after FAT Final Assembly and Test I would never recommend anyone trying to alter anything other than a minor field change/alt or replacement of a socketed chip. I would make no major changes to pre-built factory type devices. I once knew a tech who thought he could spudge a microwave oscillator without any special tools but later found out through personal experience in the field that thousand of dollars of special purpose tools were reqired to do the stuff that- that guy was trying to do blind. I was caught in a kind of trap that my senior would make me look like a sabatour because of his actions. I do not recommend wasting ones times with the unknown unless the results are possibly- significantly profitable. I dont necessarily mean money when I say this. The purpose is to have fun here. Or at least that is MY goal. ----- Original Message ----- From: To: Sent: Sunday, April 01, 2007 17:39 Subject: Re: My broken DataQ AD converter > In a message dated 2007/04/01, gmvoeth@........... writes: > >> It is not practicle for the common man to work on surface mounted >> technology you >> need to work on the new boards is expensive and medical like tools require >> fine skills. >> If you like electronics as a hobby it is best to go to a university and >> become an engineer. > > Hi Geoff, > > The same was probably said when we changed from hard wiring valves to > transistor PCBs !! > > Sure, you need the tools for the job and it hasn't get any easier with > time. The first requirements are a temperature controlled soldering iron, a > solder sucker, SS tweezers and a head mounted magnifying glass. > > I agree that 'taking a circuit diagram' can take a lot of time and > effort, but it can be done. You may only need to look at part of the circuit. I > look for the earth connection and the power supply rails first. > > Since when did a degree in engineering equip you to deal with PCB > electronics? > > Regards, > > Chris Chapman > > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: GPS and solarflairs From: Brad Douglas rez@.................. Date: Sat, 07 Apr 2007 05:05:06 +0000 On Fri, 2007-04-06 at 00:18 +0000, Jón Frímann wrote: > Hi all > > I want to point out artical about solar flairs and how they can disrupt > a gps signal. > > http://www.reghardware.co.uk/2007/04/05/solar_flares_zap_gps/ > > It is worth tracking solar flares since most of us recording earthquakes > use gps to keep track of time. Keep in mind that we're just now coming up from a solar minimum and this next cycle is supposed to be particularly strong (but solar modeling is far from diagnostic). Not only can solar flares disrupt propagation paths, but can also alter the atmospheric index of refraction and gas composition, further complication matters of spacial precision. Here's an overview of the effects on positioning due to medium (atmosphere) alteration by solar interaction: http://citeseer.ist.psu.edu/418582.html GPS is resistant to flares to a certain level, but has been demonstrated in the last cycle (where user density was much smaller and SA was on) that they can be knocked out for periods of time. The GLONASS and next gen GPS constellations should address these concerns. We have a few years to go before the solar maximum. Personally, I'm a little more concerned with ISS than satellites. It's impossible to do an EVA in those conditions and only limited areas of the ISS are shielded. -- 73, de Brad KB8UYR/6 __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: My broken DataQ AD converter From: ChrisAtUpw@....... Date: Sat, 7 Apr 2007 06:26:12 EDT In a message dated 2007/04/07, gmvoeth@........... writes: > I once knew a tech who thought he could spudge a microwave oscillator > without any special tools but later found out through personal experience in the > field that thousand of dollars of special purpose tools were reqired to do the > stuff that- > that guy was trying to do blind. Hi Geoff, What does 'spudge' involve, please? I don't know the term. What adjustements and measurements are involved in setting up and regulating this microwave oscillator? How does this relate to handling SIM ICs on a circuit board? Regards, Chris Chapman In a me= ssage dated 2007/04/07, gmvoeth@........... writes:

I once knew a tech who thought=20= he could spudge a microwave oscillator without any special tools but later f= ound out through personal experience in the field that thousand of dollars o= f special purpose tools were reqired to do the stuff that-
that guy was trying to do blind.


Hi Geoff,

       What does 'spudge' involve, please? I d= on't know the term.
       What adjustements and measurements are=20= involved in setting up and regulating this microwave oscillator?

       How does this relate to handling SIM IC= s on a circuit board?

       Regards,

       Chris Chapman Subject: Prior earthquake before a larger one From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Sat, 07 Apr 2007 13:32:34 +0000 Hi all Yesterday at 18:39 there was a mag 4.5 earthquake 285 km north of my location. I did record that earthquake really good on my system, the traces of this earthquake can be seen here. http://seismicnet.com/cgi-dos/makegif.exe?/quakes/0704/070406.184900.hvt1z.= psn http://seismicnet.com/cgi-dos/makegif.exe?/quakes/0704/070406.184900.hvt1n.= psn http://seismicnet.com/cgi-dos/makegif.exe?/quakes/0704/070406.184900.hvt1e.= psn I do belive that this earthquake is a prior earthquake to a much larger earthquake somewhere close to the location of this earthquake. I have seen activie in this region few weeks back with mag 3 - 4 earthquakes. The activite appears to be on the rise in that area. It is hard to tell when this earthquake is going to hit, but I do expect it hit sometimes in next two weeks. Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Solomon island earthquake effect on the crust From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Sat, 07 Apr 2007 14:14:43 +0000 Hi all Here is a intresting news about what did happen in the Solomon Island earthquake. http://www.dnaindia.com/report.asp?NewsID=3D1089455 It appears that the earthquake did change the landscape in the island cluster and has in some areas lifted the crust up by many meters. So much that islands that where below the ocen are now on dry land. Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Solomon island earthquake effect on the crust From: Roger Sparks rsparks@.......... Date: Sun, 08 Apr 2007 06:11:02 -0700 Good Morning All, Here is another Uplifting Article that describes effects from the Solomon Island Quake, Roger > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Earthquake swarm on the Reykjanes Ridge From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Mon, 09 Apr 2007 23:10:43 +0000 Hi all There has just started a earthquake swarm on the Reykjanes Ridge. This earthquake swarm appears to be bigger then the one I did obserive in Week 9 of 2007. At his moment there has been at least one mag 3.5 earthquake (size unkown when I write this message). There is a possiblitie that this is a volcano related earthquake swarms. But at the moment I don't know if this volcano related or not. I will send more info if I need to. Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Earthquake swarm on the Reykjanes Ridge From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Tue, 10 Apr 2007 12:53:28 +0000 Hi all I have sent in the mag 3+ earthquakes I did record from the ongoing earthquake swarm on the Reykjanes Ridge. The largest earthquakes are in the order of mag 4 to 5. The swarm is still ongoing. Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Earthquake swarm on the Reykjanes Ridge From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Wed, 11 Apr 2007 15:39:24 +0000 Hi all The Reykjanes Ridge earthquake swarm appears to be over. I did record well over 50 earthquakes in this swarm. Many of them are overlapping each other and others are less then 1 min apart. It is unknown at this time if it is volcano related or not. Last swarm in this area was in week 9, but at more distance from the shore. Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: new additions From: Dave Nelson davenn@............... Date: Sun, 15 Apr 2007 15:48:53 +1000 Greetings Gang, a note to let you all know there are a couple of new additions to the PSN Station Map and Database. Ted Channel Boise, Idaho and Idaho Museum of Mining and Geology (station managed by Linda Channel) www.sydneystormcity.com/map.htm (USA section) thanks for adding your info and just a reminder to everyone else dont forget to email me with updates if you make changes to your station. Chers Dave Nelson Sydney, Australia www.sydneystormcity.com __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: A record week From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Sun, 15 Apr 2007 07:09:01 +0000 Hi all This week has been a record for me (Week 15). My station has recored 63+ earthquakes this week and I have not even finised reviewing all the earthquakes I got. I also have many overlapping events to go over. There is also one day left over this week and many things can happen in the time left. Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: new additions From: John or Jan Lahr JohnJan@........ Date: Sun, 15 Apr 2007 07:01:33 -0700 Hi Dave, Nice maps! Thanks for this big effort! I'm running an IRIS "Seismographs in School" station in my basement. IRIS has provided more than 140 such stations to educators around the country, and the number increases by about 30 per year. See: http://www.iris.edu/edu/AS1.htm and: http://jclahr.com/science/psn/as1/ It would be great if amateurs living near a school or museum station would stop by to see if they could use any help in operating the equipment or interpreting their seismograms. Most of these stations are registered with SpiNet: http://www.scienceeducationsolutions.org/spinet/spinet_stations.php Unfortunately they don't have an interactive station map like the one you maintain for the PSN. Or, if your local school doesn't have a seismic station, but does have an interested teacher, it would be great to help the teacher set one up. They could apply to obtain one from IRIS, or apply for a small grant to purchase one for about $600. There are many sources of small grants for teachers. All of the IRIS teachers use an AS-1 with AmaSeis so that it's easy to compare records between schools. Some of the helicorder images are posted here: http://jclahr.com/science/psn/as1/heli/allas1.php Cheers, John Lahr Corvallis, Oregon At 10:48 PM 4/14/2007, you wrote: > Greetings Gang, > a note to let you all know there are a couple of new additions to the PSN >Station Map and Database. > > Ted Channel Boise, Idaho > and > Idaho Museum of Mining and Geology (station managed by Linda Channel) > > www.sydneystormcity.com/map.htm >(USA section) > thanks for adding your info >and just a reminder to everyone else dont forget to email me with updates >if you make changes to your station. > >Chers >Dave Nelson >Sydney, Australia >www.sydneystormcity.com > >__________________________________________________________ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: RE: new additions From: "Stephen Hammond" shammon1@............. Date: Sun, 15 Apr 2007 10:49:33 -0700 Welcome to the group and great work on the map Dave. Regards, Steve Hammond PSN San Jose, Aptos Calif. -----Original Message----- From: psn-l-request@.............. [mailto:psn-l-request@............... On Behalf Of Dave Nelson Sent: Saturday, April 14, 2007 10:49 PM To: psn-l@.............. Subject: new additions Greetings Gang, a note to let you all know there are a couple of new additions to the PSN Station Map and Database. Ted Channel Boise, Idaho and Idaho Museum of Mining and Geology (station managed by Linda Channel) www.sydneystormcity.com/map.htm (USA section) thanks for adding your info and just a reminder to everyone else dont forget to email me with updates if you make changes to your station. Chers Dave Nelson Sydney, Australia www.sydneystormcity.com __________________________________________________________ Public Seismic Network Mailing List (PSN-L) __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: new additions From: "tchannel" tchannel@.............. Date: Sun, 15 Apr 2007 12:43:10 -0600 Hi Folks, Just a note on our new station here in Boise Idaho. The IMMG, Idaho Museum of Mining and Geology, is a small, all volunteers group who run a Museum about 5 miles East of my other sensor TCID. The site is located at an Old Penitentiary. The building they are in is called the "Trusty Building" The whole area is very interesting. They have gardens tours of the Prison, and many activities during the summer. The Penitentiary looks like a set, from the 1930's gangster movies, guard towers old rusted security lights, and entirely made of blocks of local sandstone, quarried from the near by hills. Their wed site is __________________. Most of the volunteers are retired Earth Science folks, Miners, or rock hounds. Linda, my Wife, is retired from the USGS after 31 years. She and some others thought it would be great to have a Seismometer. I found your group and with all of your input and suggestions was able to help them out. They now have their new Station up and running, and each day is like Christmas for them. It is the greatest single display in their Museum. The volunteers and the visitors, young and old think it is the greatest. I wanted to thank the group and everyone who helped me over the months, with answers, diagrams, sources, parts, troubleshooting, and encouragement. Cheers, Ted ----- Original Message ----- From: "Stephen Hammond" To: Sent: Sunday, April 15, 2007 11:49 AM Subject: RE: new additions > Welcome to the group and great work on the map Dave. > Regards, Steve Hammond PSN San Jose, Aptos Calif. > > -----Original Message----- > From: psn-l-request@.............. [mailto:psn-l-request@............... > On Behalf Of Dave Nelson > Sent: Saturday, April 14, 2007 10:49 PM > To: psn-l@.............. > Subject: new additions > > Greetings Gang, > a note to let you all know there are a couple of new additions to > the PSN > Station Map and Database. > > Ted Channel Boise, Idaho > and > Idaho Museum of Mining and Geology (station managed by Linda > Channel) > > www.sydneystormcity.com/map.htm > (USA section) > thanks for adding your info > and just a reminder to everyone else dont forget to email me with > updates > if you make changes to your station. > > Chers > Dave Nelson > Sydney, Australia > www.sydneystormcity.com > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. > __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: IMMG address From: "tchannel" tchannel@.............. Date: Sun, 15 Apr 2007 12:49:15 -0600 Sorry I forgot the IMMG address. They are in the process of updating = their page, so I hope it is avail. Ted, http://www.idahomuseum.org/
Sorry I forgot the IMMG address.  = They are in=20 the process of updating their page, so I hope it is avail.
 
 
Ted,          =         =20 http://www.idahomuseum.org/<= /SPAN>
Subject: Re: new additions From: "peter la plante" laplantep@............... Date: Mon, 16 Apr 2007 11:03:00 -0600 Hello: My name is Pete and I am located between Parma and Nyssa Oregon. I have been interested in seismology for many years and about a year ago I started to put together a monitoring station. I purchased a 3 channel board and other items from Larry Cockrin and constructed two sensors and purchased several vertical and horizontal sensors off ebay. I have not completed the sensors and my interests have moved on. I have been a amateur radio operator for may years and have been inactive for the past ten or so years. I am planning to get back into ham radio again and wish to sell all the seismic equipment that I have. If you know any one who might be interested my phone number is 208-722-7069. Thank you. Peter J. La Plante W7SOV. __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Seislog From: "Steve Shufflebotham" Cellectronic@............. Date: Wed, 18 Apr 2007 17:58:40 +0100 Hi Everyone, Is anybody out there using "Mauro Mariotti, SADC" interface in = conjunction with "Seislog" ? I am experimenting with this setup and have an error message "Data has = been lost" this message just rolling up the screen, Everything else = seems to work ok, events detected and stopped etc but the events are = dumped. Many thanks in advance for any help. Steve
Hi Everyone,
Is anybody out there using "Mauro = Mariotti, SADC"=20 interface in conjunction with "Seislog" ?
I am experimenting with this setup and = have an=20 error message "Data has been lost" this message just rolling up the = screen,=20 Everything else seems to work ok, events detected and stopped etc but = the events=20 are dumped.
Many thanks in advance for any = help.
Steve
Subject: Re: Seislog From: Angel sismos@.............. Date: Wed, 18 Apr 2007 21:31:09 +0000

Hello Steve,


Seislog expects to get an exact number of samples in a one second package, let's say 50.  The SARA digitizer card mostly put out 50 but now and then maybe 49 or 51.  Seislog (for windows) throws out the packets that don't have the exact sample rate.  So what can you do?????


You can use the SARA acquisition software SeismowinPro.  You can use the Seislog for Linux which is smarter than the Seislog for windows.  It does not have the fancy GUI that other have but then it works real well.  You can use SeisComP from GFZ also for linux. 


Seismowin will make PSN, GSE and Seisan files it also has a LISS server so you can connect with earthworm systems. And you can use the Seisgram2k to look at the traces. 


Well I ramble, there are many options.


If I can help just write a note.


Angel


Wednesday, April 18, 2007, 4:58:40 PM, you wrote:


>

Hi Everyone,

Is anybody out there using "Mauro Mariotti, SADC" interface in conjunction with "Seislog" ?

I am experimenting with this setup and have an error message "Data has been lost" this message just rolling up the screen, Everything else seems to work ok, events detected and stopped etc but the events are dumped.

Many thanks in advance for any help.

Steve 





-- 

Best regards,

 Angel

Subject: Microquakes From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Wed, 18 Apr 2007 22:01:46 +0000 Hi all I have an access to a station located in Mosfellsb=E6 near Reykjav=EDk (I d= o not own it!). This station is located close to all the major active areas in south Iceland. SISZ is not far off and it is close to Reykjanes earthquakes areas and volcanoes. Also is a good chance of recording actitive in Myrdalsjokull volcano and Hekla volcano and other volcanoes that are close to SISZ. >From 16th today there has been microquakes close to the station. Most of those earthquakes have the size mag 0.42 to mag 1.4. At the range of 1km to 24 km. The smallest earthquakes and those how are closest to the station appear good on the station plot I that I currently have on my webpage. It is really intresting to see how the small earthquakes appears on this station. But the station is currently set on low gain (200). But it is going to increased in the end of this week I hope, but then I hopefully can record small earthquakes at bigger distance. The closest earthqauke that this station has recored was so close that p and s time diffrence is only 00.2 sec. Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: whats up! From: "swollard" swollard@.......... Date: Wed, 18 Apr 2007 18:38:12 -0400 Whats up with these e-mails. I have been getting these e-mails from = people I don'nt even know, about some kind of product. Please stop = sending these e-mails. ----- Original Message -----=20 From: Angel=20 To: Steve Shufflebotham=20 Sent: Wednesday, April 18, 2007 5:31 PM Subject: Re: Seislog Hello Steve, Seislog expects to get an exact number of samples in a one second = package, let's say 50. The SARA digitizer card mostly put out 50 but = now and then maybe 49 or 51. Seislog (for windows) throws out the = packets that don't have the exact sample rate. So what can you do????? You can use the SARA acquisition software SeismowinPro. You can use = the Seislog for Linux which is smarter than the Seislog for windows. It = does not have the fancy GUI that other have but then it works real well. = You can use SeisComP from GFZ also for linux.=20 Seismowin will make PSN, GSE and Seisan files it also has a LISS = server so you can connect with earthworm systems. And you can use the = Seisgram2k to look at the traces.=20 Well I ramble, there are many options. If I can help just write a note. Angel Wednesday, April 18, 2007, 4:58:40 PM, you wrote: > Hi Everyone, Is anybody out there using "Mauro Mariotti, SADC" interface in = conjunction with "Seislog" ? I am experimenting with this setup and have an error message = "Data has been lost" this message just rolling up the screen, Everything = else seems to work ok, events detected and stopped etc but the events = are dumped. Many thanks in advance for any help. Steve=20 =20 --=20 Best regards, Angel
Whats up with these e-mails. I have = been getting=20 these e-mails from people I don'nt even know, about some kind of = product. Please=20 stop sending these e-mails.
----- Original Message -----
From:=20 Angel=20
Sent: Wednesday, April 18, 2007 = 5:31=20 PM
Subject: Re: Seislog

Hello Steve,


Seislog expects to get an exact number of samples in a one second = package,=20 let's say 50.  The SARA digitizer card mostly put out 50 but now = and then=20 maybe 49 or 51.  Seislog (for windows) throws out the packets = that don't=20 have the exact sample rate.  So what can you do?????


You can use the SARA acquisition software SeismowinPro.  You = can use=20 the Seislog for Linux which is smarter than the Seislog for windows. =  It=20 does not have the fancy GUI that other have but then it works real = well.=20  You can use SeisComP from GFZ also for linux. 


Seismowin will make PSN, GSE and Seisan files it also has a LISS = server so=20 you can connect with earthworm systems. And you can use the Seisgram2k = to look=20 at the traces. 


Well I ramble, there are many options.


If I can help just write a note.


Angel


Wednesday, April 18, 2007, 4:58:40 PM, you wrote:


>

Hi Everyone,

Is anybody out there using "Mauro = Mariotti, SADC"=20 interface in conjunction with "Seislog" ?

I am experimenting with this setup and = have an=20 error message "Data has been lost" this message just rolling up = the=20 screen, Everything else seems to work ok, events detected and = stopped=20 etc but the events are dumped.

Many thanks in advance for any = help.

Steve 





-- 

Best regards,

 Angel

Subject: Re: whats up! From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@......... Date: Wed, 18 Apr 2007 23:16:35 +0000 On Wed, 2007-04-18 at 18:38 -0400, swollard wrote: > Whats up with these e-mails. I have been getting these e-mails from > people I don'nt even know, about some kind of product. Please stop > sending these e-mails. Hi Please leave the PSN list if you have not registerd on it. You can do so here, http://seismicnet.com/maillist.html Regards. --=20 J=F3n Fr=EDmann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Predictions From: "tchannel" tchannel@.............. Date: Fri, 20 Apr 2007 16:24:41 -0600 Hi Folks, Just curious about the subject of Earthquake Predictions. = We all can predict earthquakes, if we keep the "when" and "where" = nonspecific. But on a serious note, are there any scientific tools = used? Do the phases of the moon and the tides play a part? I have = asked this question to several people and received just as many = opinions. Thanks, Ted
Hi Folks,  Just curious about the = subject of=20 Earthquake Predictions.   We all can predict earthquakes, if = we keep=20 the "when" and "where" nonspecific.   But on a serious = note, are=20 there any scientific tools used?   Do the phases of the moon = and the=20 tides play a part?   I have asked this question to several = people and=20 received just as many opinions.
 
Thanks, Ted
Subject: Re: updates and additions From: Dave Nelson davenn@............... Date: Sat, 21 Apr 2007 11:04:17 +1000 Hi Gang :) Greetings from drought stricken Australia. Plans are afoot for a mass migration to New Zealand and USA ;) . Seriously tho ... its getting really bad here, as water supplies dry up for farms and cities alike. Sydney's water reserves are in the mid 30's % and Melbourne is somewhere ~ 15%. Back to the PSN .... thanks to those that have responded Pete Rowe ... dang mate dunno why you have been left off the list for so long thanks for the info :) John Lahr ... likewise. I have just put a link direct to your homepage 1999 seems so long ago when i got to visit you and the other guys in Golden, CO. at the NEIC HQ Dave Wolny ... Time flies doesnt it :) thanks buddy Michael Kimzey ... a new addition to the PSN, great to hear from you and welcome. Roger Sparks ... and how did you also get missed out in the early days of setting up the database and maps ... better late than never :) tnx mate There are several names of people that I see in the e-mail from time to time that I know are not on the map. Maybe they would like to get in touch with me at some stage and let me kow what gear they are running. Finally, dont forget, if you havent already, to update your bookmarks with my correct homepage address. main page = www.sydneystormcity.com or to get direct to the maps www.sydneystormcity.com/map.htm cheers Dave N Sydney Oz __________________________________________________________ Public Seismic Network Mailing List (PSN-L) Subject: Re: Predictions From: "Dave \(Santa Dave\)" kc6old@............. Date: Fri, 20 Apr 2007 19:16:58 -0700 (PDT) Back in the late 80s there was an "ham" (amateur radio) net which met and this group of hams did a whole bunch of record keeping of things like well head hight, lost dogs (via newspaper ads) Earthquake logging, and other "possables" . after more "man" hours than you can imagine the only correlation I ever heard of was one man logged EVERY known earthquake versus the position of the moon -- and found a Slight tendancy towards quakes in the northern hemisphere when the moon was high in the southern hemishere. This group was on two metters and was known as the PUBLIC SIESMIC NET. I only know of two people who were involved in that. Dave, Kc6old tchannel wrote: Hi Folks, Just curious about the subject of Earthquake Predictions. We all can predict earthquakes, if we keep the "when" and "where" nonspecific. But on a serious note, are there any scientific tools used? Do the phases of the moon and the tides play a part? I have asked this question to several people and received just as many opinions. Thanks, Ted
Back in the late 80s there was an "ham" (amateur radio) net which met and this group of hams did a whole bunch of record keeping of things like well head hight, lost dogs (via newspaper ads) Earthquake logging, and other "possables" . after more "man" hours than you can imagine the only correlation I ever heard of was one man logged EVERY known earthquake versus the position of the moon -- and found a Slight tendancy towards quakes in the northern hemisphere when the moon was high in the southern hemishere.
This group was on two metters and was known as the PUBLIC SIESMIC NET.
I only know of two people who were involved in that.
Dave, Kc6old

tchannel <tchannel@..............> wrote:
Hi Folks,  Just curious about the subject of Earthquake Predictions.   We all can predict earthquakes, if we keep the "when" and "where" nonspecific.   But on a serious note, are there any scientific tools used?   Do the phases of the moon and the tides play a part?   I have asked this question to several people and received just as many opinions.
 
Thanks, Ted

Subject: Re: Predictions From: ChrisAtUpw@....... Date: Fri, 20 Apr 2007 23:23:04 EDT In a message dated 2007/04/20, tchannel@.............. writes: > Just curious about the subject of Earthquake Predictions. But on a serious > note, are there any scientific tools used? Do the phases of the moon and the > tides play a part? I have asked this question to several people and received > just as many opinions. Hi Ted, Type Earthquake Prediction into Google? See http://www.nature.com/nature/debates/earthquake/equake_frameset.html Short answer is that we don't know. Strong quakes may be associated with parts of the tide cycle. The question is which cycle? The local background noise may decrease before a large quake. There may be physical movement before shallower quakes, but you are unlikely to get much observable effect at the surface if the rupture is 100 km down. About 1/3 of quakes show precursor quakes. There may be a few cycles of very long period precursor. There may be changes in the water table, changes in Radon emission, electric / RF field noise, animals seem to be able to sense 'something'..... One thing is certain. If you say we will never be able to predict quakes and no funds to experiment are allocated, we WON'T develop the / any ability!! Even if we could only get timely warning for a few quake locations / depths, the benefits could be very significant. A lot of the severe quakes are associated with subduction zones, like those off the west coast of the Americas, but the interval may be hundreds of years. Regards, Chris Chapman In a me= ssage dated 2007/04/20, tchannel@.............. writes:

Just curious about the subject=20= of Earthquake Predictions. But on a serious note, are there any scientific t= ools used? Do the phases of the moon and the tides play a part? I have asked= this question to several people and received just as many opinions.<= FONT COLOR=3D"#000000" BACK=3D"#ffffff" style=3D"BACKGROUND-COLOR: #ffffff"= SIZE=3D3 PTSIZE=3D12 FAMILY=3D"SANSSERIF" FACE=3D"Arial" LANG=3D"0">

Hi Ted,

       Type Earthquake Prediction into Google?=
       See http://www.nature.com/nature/debate= s/earthquake/equake_frameset.html

       Short answer is that we don't know. Str= ong quakes may be associated with parts of the tide cycle. The question is w= hich cycle? The local background noise may decrease before a large quake. Th= ere may be physical movement before shallower quakes, but you are unlikely t= o get much observable effect at the surface if the rupture is 100 km down. A= bout 1/3 of quakes show precursor quakes. There may be a few cycles of very=20= long period precursor. There may be changes in the water table, changes in R= adon emission, electric / RF field noise, animals seem to be able to sense '= something'.....
       One thing is certain. If you say we wil= l never be able to predict quakes and no funds to experiment are allocated,=20= we WON'T develop the / any ability!! Even if we could only get timely warnin= g for a few quake locations / depths, the benefits could be very significant= .. A lot of the severe quakes are associated with subduction zones, like thos= e off the west coast of the Americas, but the interval may be hundreds of ye= ars.

       Regards,

       Chris Chapman Subject: Re: Predictions From: Stephen & Kathy skmort@............ Date: Fri, 20 Apr 2007 23:12:44 -0700 FYI,, Following this little introduction, is a simple study I did a few years ago!! Since then I have tried to correlate the events to Solid Earth Tide,,, so far I have found no correlation!! My conclusion at this point is that I think there may be a moon and or sun tide connection, but like trying to predict the position in the bending cycle where a wire will finally break, that you bend with your fingers, there appears to be a similar problem with trying to tie a tidal phase point to quakes???? It simply breaks when it is ready, no matter where in the tidal cycle of bending it happens to be???? The complexity of water tides may also contribute to the problem for events that happen in the vicinity of ocean tides????? The reason I feel that there may be a phase connection, becomes clear from the following study where we see that the time of the new moon, where we have the greatest tidal motion, also favors the greatest number of quakes?????? I am open to correction, other studies, other data, and or other conclusions!!!! Stephen PSN Station #55 Subject: Large quakes (mag. 8 and above) and their relationship to Moon phases, using data found over the web