[time-nuts] ocxo

Bob Camp kb8tq at n1k.org
Fri Nov 21 19:21:58 EST 2014


Hi

I believe that the SR620 uses a “true” 10 MHz OCXO. I would be careful using a 5 MHz doubled to 10 OCXO. The counter may or may not be happy with sub-harmonic induced jitter. 

Best bet at the specs:

+12V power
0-5V EFC
Sine wave out +7dbm

+/- 5x10^-9 0 to 70C

Pinout - trace what you have.

Bob

> On Nov 21, 2014, at 6:59 PM, Don Latham <djl at montana.com> wrote:
> 
> 
> So, I got a reasonable deal on a SR620 ho ho. Know your dealer. The ocxo is
> out of tolerance. All self tests pass with flying colors, autocal works as
> well. So the best parts are OK.
> Does anyone:
> 1) have a spare Isotemp OCXO36-53 10.000 MHz  p/n 6-00051?
> 2) know the specs, ie the input voltage/current and the control voltage span
> and direction? pinout?
> I have some Morion mv-89's  and could easily cobble one in if it will work.
> Apparently a correct oscillator must be in place to use an external source, if
> I read the manual right.
> 
> 3) do we have a source for the schematics for the SR 620?
> 
> The FTS 4060 is up, pumpin' and firmly locked. At least for now. That dealer
> was not lyin'
> 
> Much thanks to all of you.
> The adventure continues
> 
> 
> -- 
> "The power of accurate observation is commonly called cynicism by those who
> have not got it."
> -George Bernard Shaw
> 
> Dr. Don Latham AJ7LL
> Six Mile Systems LLC
> 17850 Six Mile Road
> Huson, MT, 59846
> mail:  POBox 404
> Frenchtown MT 59834-0404
> VOX 406-626-4304
> Skype: buffler2
> www.lightningforensics.com
> www.sixmilesystems.com
> 
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.



More information about the time-nuts mailing list