[time-nuts] Model # FE2040B

[Bob kb8tq]

Hi

Ok, so what you have is an FEI part that somebody else has messed with.
They mounted it on a box and wired this and that to here and there.

Best guess is that the switch on the top of the unit once did this:

comp = lock the internal standard to an external standard ( = where it is set now)
ext = just use the external standard
int = just use the internal standard. 

Does it still do that? Did the previous owner tinker inside the FEI? Who knows ….

If it *is* now set to “lock up to external standard” and you don’t have a proper 
external standard ( = what it expects to see ) hooked up, it probably will just 
wander around.

Bob


> On May 11, 2020, at 9:30 AM, Gordon Batey <gpbatey at wildblue.net> 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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> ------------------------------
> 
> 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
> 
> ------------------------------
> 
> 
> 
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