[time-nuts] FW: Model # FE2040B

Tue May 12 00:49:45 UTC 2020

I should mention the frequency shown would be a totally cold oscillator as
my guess.

On Mon, May 11, 2020 at 8:49 PM paul swed <paulswedb at gmail.com> wrote:

> Yes indeed that certainly looks like a an/urr r1051 frequency module.
> There should be something like a 20 V in though the model you have is
> later then what I have seen. The older r1051 modules had schematics and
> could very reasonably be taken apart to get to everything.
> They are also reasonable to reverse engineer. Though it does mean
> unsoldering various wires and small coaxes. But thats not really that hard
> to do.
> Good luck
>
> On Mon, May 11, 2020 at 7:05 PM Glenn Little WB4UIV <
> glennmaillist at bellsouth.net> wrote:
>
>> If I were a betting man, I would put my money on the reference
>> oscillator from a R-1051 receiver.
>> Accuracy is speced at 1x10^8ï¿½ 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:k8yumdoober at gmail.com> <
>> k8yumdoober at gmail.com>
>> > To: Discussion of precise time and frequency measurement
>> >     <mailto:time-nuts at lists.febo.com> <time-nuts at lists.febo.com>
>> > Subject: Re: [time-nuts] Model # FE2040B
>> > Message-ID:
>> >
>> > <mailto:
>> CADHrwpc3Ja2O3EETHz5qJowTPp07TTE7VC7ynOVmfwNadQagmA at mail.gmail.com>
>> > <CADHrwpc3Ja2O3EETHz5qJowTPp07TTE7VC7ynOVmfwNadQagmA at 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:
>> gpbatey at wildblue.net>
>> > <gpbatey at wildblue.net> 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
>> > gpbatey at wildblue.net <mailto:gpbatey at wildblue.net>
>> >
>> >
>> >
>> > _______________________________________________
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>> > and follow the instructions there.
>> >
>> >
>> >
>> >
>> > ------------------------------
>> >
>> > Message: 2
>> > Date: Tue, 5 May 2020 22:00:04 +0000 (UTC)
>> > From: gandalfg8 at aol.com <mailto:gandalfg8 at aol.com>
>> > To:  <mailto:time-nuts at lists.febo.com> "time-nuts at lists.febo.com"
>> > <mailto:time-nuts at lists.febo.com> <time-nuts at lists.febo.com>
>> > Subject: Re: [time-nuts] Model # FE2040B
>> > Message-ID:  <mailto:631455933.1256218.1588716004450 at mail.yahoo.com>
>> > <631455933.1256218.1588716004450 at mail.yahoo.com>
>> > 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
>> >
>> > ------------------------------
>> >
>> >
>> >
>> >
>> > _______________________________________________
>> > time-nuts mailing list -- time-nuts at lists.febo.com
>> > To unsubscribe, go to
>> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
>> > and follow the instructions there.
>>
>> --
>> -----------------------------------------------------------------------
>> Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
>> Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    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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>>
>