Re: [time-nuts] Frequency Electronics FE-5650A

2006-12-17 Thread M. Warner Losh
In message: <[EMAIL PROTECTED]> [EMAIL PROTECTED] writes: : The japanese site provides a bit of extra data, but with no translation, : it is a bit hard to understand. google doesn't do the job? Warner ___ time-nuts mailing list time-nuts@fe

Re: [time-nuts] Frequency Electronics FE-5650A

2006-12-17 Thread geraldm
Hi Rob, Thanks for the feedback. You are right and your comment about the task on your hand in an understatement. However, us Aussies never give up. I do agree the little brick does run hot, however both units have failed in the same region and fail to lock. In particular one unit had suffered

Re: [time-nuts] Frequency Electronics FE-5650A

2006-12-17 Thread geraldm
Hi Jason, Thanks for the email address. Peter Vince has just sent me a technical manual in PDF, I hope there is some hidden data that I could use in my quest to repair both units. Should I find anything, I would will share the data or findings. I have been on these 2 failed units for over 6 mont

Re: [time-nuts] Frequency Electronics FE-5650A

2006-12-17 Thread geraldm
Hi Vince, I have been aware of the leapsecond website for some time, so thanks. The japanese site provides a bit of extra data, but with no translation, it is a bit hard to understand. Cheers. Gerald >-- Original Message -- >Date: Mon, 18 Dec 2006 00:46:53 + >To: Discussion of precise tim

Re: [time-nuts] LPRO-101 with Brooks Shera's GPS locking circuit

2006-12-17 Thread Dr Bruce Griffiths
[EMAIL PROTECTED] wrote: Hi Bruce, great ideas, thanks! Said ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Said Attached circuit illustrates how a PT100 may be interfaced to a single ch

Re: [time-nuts] LPRO-101 with Brooks Shera's GPS locking circuit

2006-12-17 Thread SAIDJACK
Hi Bruce, great ideas, thanks! Said ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

[time-nuts] iLotus M12M Timing receiver

2006-12-17 Thread Magnus Danielson
Hi! On friday my iLotus M12M Timing GPS receiver. The Synergy GPS development pack suited my needs very well and it didn't take long to have it up and running, just what I needed after a hard day of work. I have been running the WinOncore12 software and have noticed that the Oscillator Offset is

Re: [time-nuts] Frequency Electronics FE-5650A

2006-12-17 Thread Peter Vince
As Jason says, John Cuthbertson was helpful and sent me a PDF copy of the Ops & Maintenance manual, although it doesn't have a circuit diagram in it. As it is 764KB in size, I have emailed it directly to Gerald rather than post it here - if anyone else would like a copy, just ask. Note there

Re: [time-nuts] LPRO-101 with Brooks Shera's GPS locking circuit

2006-12-17 Thread Dr Bruce Griffiths
[EMAIL PROTECTED] wrote: > Hi Bruce, > > would you have pointers to good temperature sensing circuits with sub > millidegree resolution? > > thanks, > Said > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/li

Re: [time-nuts] Looking For Info On A Kode/Odetics375-642TimeDisplayUnit

2006-12-17 Thread Jack Hudler
That's exactly what I use mine for. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jason Rabel Sent: Sunday, December 17, 2006 4:59 PM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] Looking For Info On A Kode/Odetics37

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread David Smith
Bruce, I've owned a Trak Systems 8821 for over a year, and had a problem with the antenna side. Yours may be different. My unit is designed to work with a powered antenna, and it feeds 12V up the coax to power it. Apparently this is the "standard" voltage for TNC antenna connections - the sm

Re: [time-nuts] Frequency Electronics FE-5650A

2006-12-17 Thread Jason Rabel
You can try contacting John Cuthbertson at Frequency Electronics about it... His email is: johncu AT freqelec DOT com Jason -Original Message- Hi, Help needed. I am seeking detailed technical information "schematics if possible" for the FE5650A Rubidium frequency oscillator I have 2

Re: [time-nuts] Looking For Info On A Kode/Odetics 375-642TimeDisplayUnit

2006-12-17 Thread Jason Rabel
That's okay, I just thought someone out there might have known off the top of their head, it's not a big deal. There is I believe a 2MHz oscillator there next to the switches, that's why I thought maybe it could free-run. I haven't probed those E1,E2, and E3 pads next to the switch yet, I'll prob

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Jason Rabel
Before doing all sorts of crazy tests, cable checks, and hours on end googling for info... Why not just hook up another antenna directly to the unit that you know is good? I have a couple spares sitting in a drawer that I use for testing only. They are just those cheap ones you find everyone selli

Re: [time-nuts] LPRO-101 with Brooks Shera's GPS locking circuit

2006-12-17 Thread Dr Bruce Griffiths
[EMAIL PROTECTED] wrote: > Hi Bruce, > > would you have pointers to good temperature sensing circuits with sub > millidegree resolution? > > thanks, > Said > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/li

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Magnus Danielson
From: [EMAIL PROTECTED] Subject: Re: [time-nuts] Failure mode in GPS receivers Date: Sun, 17 Dec 2006 22:45:52 +0100 (CET) Message-ID: <[EMAIL PROTECTED]> > Magnus, Björn, > Was there not a local "jamming" case in your hometown, where a waterfilled > GPS antenna managed to start radiating, jammi

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Magnus Danielson
From: "Poul-Henning Kamp" <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Failure mode in GPS receivers Date: Sun, 17 Dec 2006 21:39:47 + Message-ID: <[EMAIL PROTECTED]> > In message <[EMAIL PROTECTED]>, Magnus Danielson write > s: > > >I think the culprit was that the manufactures tag was sitti

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Jack Hudler
A nick in the jacket allowed UV to break down fiber optic. One receiver had failed and the other kept going for a while longer until I sused what was up. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of geo Sent: Sunday, December 17, 2006 3:10 PM To: time

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread bg
On Sun, December 17, 2006 22:27, Magnus Danielson said: > From: geo <[EMAIL PROTECTED]> > Subject: Re: [time-nuts] Failure mode in GPS receivers > Date: Sun, 17 Dec 2006 21:10:02 + > Message-ID: <[EMAIL PROTECTED]> > >> >> oh yes . >> >> 1) Waterlevel in GPS antenna's "hermetic" too high ..

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Poul-Henning Kamp
In message <[EMAIL PROTECTED]>, Magnus Danielson write s: >I think the culprit was that the manufactures tag was sitting over the venting >plug. At least I think it was a venting plug. I have that tag sitting on my >monitor at work these days. Ah well. ...and whenever you leave your computer for

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread bg
On Sun, December 17, 2006 22:27, Magnus Danielson said: >> 2) Coaxial cable damaged, due to nice little pecking birds :-( > > Oh, those lovely birds! :-) > > The non-optimal placement we have for our antenna just happends to make it > fairly uninteresting for birds. There are better sit-and-enjoy-t

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Magnus Danielson
From: David Forbes <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Failure mode in GPS receivers Date: Sun, 17 Dec 2006 14:09:19 -0700 Message-ID: <[EMAIL PROTECTED]> Dave, > The point is that some receivers require more RF signal from the > antenna than others to achieve the same satellite trackin

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread bg
On Sun, December 17, 2006 22:09, David Forbes said: > At 12:04 PM -0800 12/17/06, Bruce Lane wrote: >>On 17-Dec-06 at 19:54 Poul-Henning Kamp wrote: >> >>>In message <[EMAIL PROTECTED]>, "Bruce Lane" >>>writes: Fellow clock-tickers, In the group's experience, what's the most co

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Magnus Danielson
From: geo <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Failure mode in GPS receivers Date: Sun, 17 Dec 2006 21:10:02 + Message-ID: <[EMAIL PROTECTED]> > > oh yes . > > 1) Waterlevel in GPS antenna's "hermetic" too high ... the ice inside the >"hermetic" was melting down ( Hi Magnus

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread David Forbes
At 12:04 PM -0800 12/17/06, Bruce Lane wrote: >On 17-Dec-06 at 19:54 Poul-Henning Kamp wrote: > >>In message <[EMAIL PROTECTED]>, "Bruce Lane" >>writes: >>>Fellow clock-tickers, >>> >>>In the group's experience, what's the most common failure >>> mode for GPS receivers, especially older on

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread geo
oh yes . 1) Waterlevel in GPS antenna's "hermetic" too high ... the ice inside the "hermetic" was melting down ( Hi Magnus ;-) ) 2) Coaxial cable damaged, due to nice little pecking birds :-( Regards, Martin ___ time-nuts mailing list time-n

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread bg
On Sun, December 17, 2006 21:34, Bruce Lane said: > Good day, > > *** REPLY SEPARATOR *** > > On 17-Dec-06 at 21:25 [EMAIL PROTECTED] wrote: > >>On Sun, December 17, 2006 20:54, Poul-Henning Kamp said: >>> In message <[EMAIL PROTECTED]>, "Bruce Lane" >>> writes: Fellow clock-ti

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Bruce Lane
Good day, *** REPLY SEPARATOR *** On 17-Dec-06 at 21:25 [EMAIL PROTECTED] wrote: >On Sun, December 17, 2006 20:54, Poul-Henning Kamp said: >> In message <[EMAIL PROTECTED]>, "Bruce Lane" >> writes: >>>Fellow clock-tickers, >>> >>> In the group's experience, what's the most

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread bg
On Sun, December 17, 2006 20:54, Poul-Henning Kamp said: > In message <[EMAIL PROTECTED]>, "Bruce Lane" > writes: >>Fellow clock-tickers, >> >> In the group's experience, what's the most common failure >> mode for GPS receivers, especially older ones, that could stop them >> from hearing the

[time-nuts] BAMA scaling back

2006-12-17 Thread Bruce Lane
Fellow techies in all groups (that I subscribe to), I just found the following on Usenet from BAMA's owner. It seems that storage is becoming a problem for him. I'm posting this to all four groups I subscribe to because it could potentially affect anyone who's searching for documentatio

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Magnus Danielson
From: "Poul-Henning Kamp" <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Failure mode in GPS receivers Date: Sun, 17 Dec 2006 19:54:28 + Message-ID: <[EMAIL PROTECTED]> > In message <[EMAIL PROTECTED]>, "Bruce Lane" writes: > >Fellow clock-tickers, > > > > In the group's experience, what's

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Poul-Henning Kamp
In message <[EMAIL PROTECTED]>, "Bruce Lane" writes: >>> In the group's experience, what's the most common failure >>> mode for GPS receivers, especially older ones, that could stop them >>> from hearing the sats? >> >>Antenna damage. > > Are you sure? Especially considering that the o

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Bruce Lane
Hi, Poul, *** REPLY SEPARATOR *** On 17-Dec-06 at 19:54 Poul-Henning Kamp wrote: >In message <[EMAIL PROTECTED]>, "Bruce Lane" >writes: >>Fellow clock-tickers, >> >> In the group's experience, what's the most common failure >> mode for GPS receivers, especially older ones,

Re: [time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Poul-Henning Kamp
In message <[EMAIL PROTECTED]>, "Bruce Lane" writes: >Fellow clock-tickers, > > In the group's experience, what's the most common failure > mode for GPS receivers, especially older ones, that could stop them > from hearing the sats? Antenna damage. -- Poul-Henning Kamp | UNIX since Z

[time-nuts] Failure mode in GPS receivers

2006-12-17 Thread Bruce Lane
Fellow clock-tickers, In the group's experience, what's the most common failure mode for GPS receivers, especially older ones, that could stop them from hearing the sats? I ask because my Trak Systems 8820 clock, which has worked perfectly well for nearly a year since I installe

Re: [time-nuts] Using Allan Plots, was(LPRO-101 with Brooks Shera's GPS locking circuit)

2006-12-17 Thread Brooke Clarke
Hi Ulrich: Thanks very much for your email of 16 December it's a big help for me to understand how to use Allan plots. I would like to learn more about their application to Time Interval Counters. For example I have the SR620 and although the one shot resolution is 1 ps the one shot precisio

Re: [time-nuts] Frequency Electronics FE-5650A

2006-12-17 Thread Rob Kimberley
FEI don't issue schematics for their products, and obviously charge for repairs. These bricks do run hot as I remember and need plenty of sinking. Sorry, I know this doesn't help, but I think you quite a task on your hands trying DIY, and should consider contacting FEI www.freqelec.com Rob K ---

Re: [time-nuts] Looking For Info On A Kode/Odetics 375-642 Time DisplayUnit

2006-12-17 Thread Robert Atkinson
Hi, I also have one of these and any info would be welcome. I might try going through the settings if I get bored ;-) Robert G8RPI. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jason Rabel Sent: 16 December 2006 22:06 To: time-nuts@febo.com Subject: [ti

[time-nuts] Frequency Electronics FE-5650A

2006-12-17 Thread Gerald Molenkamp
Hi, Help needed. I am seeking detailed technical information "schematics if possible" for the FE5650A Rubidium frequency oscillator I have 2 units, both have failed in the same manner, and are suffering from no lock and over heating. Have now spent a solid month fault finding both units, I a

Re: [time-nuts] Looking For Info On A Kode/Odetics 375-642 TimeDisplayUnit

2006-12-17 Thread Rob Kimberley
Most of these type of display rely on an input code, as they don't have an internal oscillator. As I mentioned in my previous post to Jason, they are probably code selection switches for IRIG A, B, NASA (36?). Alternatively they may give the unit the ability to read modulated or un-modulated Time C