[time-nuts] FW: Model # FE2040B

Tue May 12 00:49:02 UTC 2020

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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