We are spending most of our time to find the best clean up loop, work includes
EFOS 3 and 4. If would be nice if some one can share info on the 1050A we would
duplicate and test
Thanks Bert Kehren
In a message dated 11/25/2019 9:39:16 PM Eastern Standard Time,
act...@hotmail.com writes:
Hi Jim;This may be best to go back to Time-Nuts for this.A properly working
1050A is still one of the best Quartz Standards/Clean-Up Oscillators ever made
and most likely will be for the foreseeable future making it well worth the
effort of building extensive documentation - I for one would really enjoy
contributing to that effort. Actually I think this logic could apply to a
number of products.Now may be a good time if other Time-Nuts are interest in
the same thing. A group of Time-Nuts could create a schematic of the basic
design and the various revisions/options. Add photos, voltages, and signals at
various test points, and how problems were resolved. I have found that most
instruments have "The Usual Suspects" a few areas where in the unlikely event
they have an issue it will often be the same part. On the short term problem
you are seeing I would test the 1000B out of circuit first and follow the
signal path from there. Which options and what are the approximate build dates
of yours.My main point is years ago there were third party companies like Sam
Photo Fax offering tech and repair data on a wide range of electronics, and in
this era where more and more companies are unwilling to share schematics and
repair info we are seeing communities like the Time-Nuts, Volt-Nuts, and XDevs
doing just that. Perhaps it is time to bring a more systemic and structured
approach to that end. I would really enjoy being a part of such an
effort.Cheers;
Tom Knox
SR Test and Measurement Engineer
Ascent Concepts and Technology
4475 Whitney Place
Boulder Colorado 80305
303-554-0307
act...@hotmail.com
"Peace is not the absence of violence, but the presence of Justice" Both MLK
and Albert Einstein
From: AC0XU (Jim)
Sent: Monday, November 25, 2019 4:26 PMTo: Tom Knox
Subject: Re: [time-nuts] Service manuial for FTS 1050A or
1150A
Tom-
Thanks for that. There is normal power in to the controller board and no power
out. Shouldn't be too hard to track down, but the power board suprises me in
its complexity. Was hoping to find a schematic...
BTW, I also have a few of these units. One works really well. Another has very
poor short time stability. I am guessing that there is something wrong with
it, but do you have any ideas what could cause the behavior?
Jim
At 01:22 PM 11/25/2019, you wrote:Hi Jim;Let me know if you have any luck on
the 1050A manual and I will do the same, I think the 1050A and 5071A are the
holy Grail of service manuals. I have a couple 1050A's with issues. These are
great cleanup oscillators, they often far exceed PN specs, I one better then
128dB @ 1Hz which puts them up there with BVA's. The power board should not be
to much trouble, If you need me to measure any voltages on a working 1050A let
me know.Cheers;
Tom Knox
SR Test and Measurement Engineer
NIST/Ascent Concepts and Technology
4475 Whitney Place
Boulder Colorado 80305
303-554-0307
act...@hotmail.com"Peace is not the absence of violence, but the presence of
Justice" Both MLK and Albert Einstein
From: time-nuts
on behalf of AC0XU (Jim)
Sent: Sunday, November 24, 2019 9:55 AMTo:
time-nuts@lists.febo.com Subject: [time-nuts] Service
manuial for FTS 1050A or 1150A
Does anyone have a service manual for either FTS 1050A or 1150A (they are
almost identical)? I have an 1150A with a bad power board
Thanks!
Jim
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