If I were a betting man, I would put my money on the reference
oscillator from a R-1051 receiver.
Accuracy is speced at 1x10^8� per day.
This is a depot repair item and the best that the manual gives is a very
detailed block diagram.
73
Glenn
WB4UIV
On 5/11/2020 9:30 AM, Gordon Batey wrote:
Greetings,
Thanks for the comments.
Attached ate some pictures of this unit.
I have not looked inside (yet) The other outputs
appear to have been directly related to the 10 MHZ value.
I have NOT attempted to adjust anything yet. It has been on
about 6 days mot and reand 10000209.91 down from 10000367.00
when first turned on. The two red wires come from separate 3
terminal ?? voltage regulators. So perhaps the oven is open?
73 Gordon WA4FJC
----------------------------------------------------------------------
Message: 1
Date: Tue, 5 May 2020 12:21:12 -0500
From: Dana Whitlow <mailto:[email protected]> <[email protected]>
To: Discussion of precise time and frequency measurement
<mailto:[email protected]> <[email protected]>
Subject: Re: [time-nuts] Model # FE2040B
Message-ID:
<mailto:cadhrwpc3ja2o3eethz5qjowtpp07tte7vc7ynovmfwnadqa...@mail.gmail.com>
<cadhrwpc3ja2o3eethz5qjowtpp07tte7vc7ynovmfwnadqa...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Gordon,
Out of curiosity, what variety of standard is it?
Dana
On Tue, May 5, 2020 at 10:18 AM Gordon Batey <mailto:[email protected]>
<[email protected]> wrote:
Greeting to the timekeepers,
I have just acquired a Frequency Electronics FE2040B Frequency Standard.
It has been off for a long time. It is mounted on a small chassis
with a power supply And BNC connectors. Has outputs labeled 10 Mhz. 5
Mhz, 1 Mhz and 500Khz.
One BNC is labeled 5 Mhz IN. It is operational and the 10 Mhz is high
but coming down.
It has SMA connectors with short cables going to the BNC outputs.
Some SMA connectors are not connected.
It has been on for about 12 hours now and does not seem to have an oven.
I am seeking a manual or schematic for this unit.
Any thoughts appreciated.
73 Gordon WA4FJC
[email protected] <mailto:[email protected]>
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------------------------------
Message: 2
Date: Tue, 5 May 2020 22:00:04 +0000 (UTC)
From: [email protected] <mailto:[email protected]>
To: <mailto:[email protected]> "[email protected]"
<mailto:[email protected]> <[email protected]>
Subject: Re: [time-nuts] Model # FE2040B
Message-ID: <mailto:[email protected]>
<[email protected]>
Content-Type: text/plain; charset=UTF-8
Just a thought, and it is just a thought never having come across one of
these before....
If it doesn't seem to have an oven, does it seem to have any obvious
enclosed oscillator module?
If it's "only" the 10MHz is high, I'm making an assumption here, is it
possible that the 5MHz input is used to condition a 10MHz oscillator
that's taking time to settle, whilst the other outputs are taken either
directly from the 5MHz input or divided down from it?
Nigel GM8PZR
Greeting to the timekeepers,
I have just acquired a Frequency Electronics FE2040B Frequency Standard.
It has been off for a long time. It is mounted on a small chassis with a
power supply
And BNC connectors. Has outputs labeled 10 Mhz. 5 Mhz, 1 Mhz and 500Khz.
One BNC is labeled 5 Mhz IN. It is operational and the 10 Mhz is high but
coming down.
It has SMA connectors with short cables going to the BNC outputs. Some
SMA connectors are not connected.
It has been on for about 12 hours now and does not seem to have an oven.
I am seeking a manual or schematic for this unit.
Any thoughts appreciated.
73 Gordon WA4FJC
gpbatey at wildblue.net
------------------------------
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--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV [email protected] AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
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