Posted by
Wes Stewart-2 on
Jun 05, 2018; 10:17pm
URL: http://elecraft.85.s1.nabble.com/K3S-XREF-GPSDO-recommendation-needed-tp7641686p7641727.html
I'm not answering for Ed, and I don't have the Ref Lock doodad for my K3.
That said, a decent OCXO, like a Morion, will have, after warm up and a little
aging, stability more than adequate to discipline a K3. The K3 isn't phase
locked to an external reference anyway, it's just "nudged" on frequency
periodically.
If GPS lock is lost on the Bodnar device it reverts to a TCXO that is likely no
better than the one in the K3, assuming the high stability option. (Note: I
haven't pursued all of the relevant specs, this is just gut feel.)
I have the Bodnar unit because my sweetie asked me what I wanted for Christmas a
few years ago and I had just read about it. I have no compelling need, but I
did use it with a modified SDR-IQ to try my hand at the last ARRL FMT. I also
have a Morion, off eBay, that I thought I should have. I have yet to apply
power to it :-) I suppose I was remembering the days when I would have killed
to have something that accurate.
Likewise after reading timenuts I thought I should get a TAPR GPS time standard
kit. I have absolutely no need for that either but Lady Heather looks nice on a
spare computer screen ticking away at one second increments with nanosecond
accuracy :-).
Wes N7WS
On 6/5/2018 12:55 PM, Clay Autery wrote:
> Just curious... Why would you choose NOT to discipline the OXCO?
>
> And I agree.... wall warts, and indeed ALL switching supplies are the work of
> Satan. <wink>
>
> I have/am eliminated/ing everyone I can.
>
> I don't have a device with an OXCO yet, but I am powering my TXCO GPSDO from
> Bodnar with a VERY quiet linear DC supply. (Astron Linear with additional
> outboard regulation and filtering).
>
> 73,
>
> ______________________
> Clay Autery, KY5G
> (318) 518-1389
>
> On 06/05/18 10:53, Edward R Cole wrote:
>> I do not use a GPSDO for 10-MHz reference source. Instead I bought a Russian
>> surplus OCXO from e-bay for $40:
>>
http://www.kl7uw.com/K3EXREF.htm was my beta-tester report
>>
http://www.kl7uw.com/Rubidium.htm more info on OCXO install. I stopped using
>> a "wall-wart" for 12v supply after discovering excess ripple from the
>> "wart". Now I simply use my station Astron 50 which runs 24/7.
>>
>> For GPS time I use a little GPS dongle (plugs into computer USB jack). Model
>> BU-363 found on e-bay for about $15. I run BktTime (IZ2BKT) sw to control
>> computer time (previously used Dimension-4). This keeps my computer time
>> accurate for running JT65.
>>
>> 73, Ed - KL7UW
>>
http://www.kl7uw.com>> Dubus-NA Business mail:
>>
[hidden email]
>>
>
> ______________________________________________________________
> Elecraft mailing list
> Home:
http://mailman.qth.net/mailman/listinfo/elecraft> Help:
http://mailman.qth.net/mmfaq.htm> Post: mailto:
[hidden email]
>
> This list hosted by:
http://www.qsl.net> Please help support this email list:
http://www.qsl.net/donate.html> Message delivered to
[hidden email]
______________________________________________________________
Elecraft mailing list
Home:
http://mailman.qth.net/mailman/listinfo/elecraftHelp:
http://mailman.qth.net/mmfaq.htmPost: mailto:
[hidden email]
This list hosted by:
http://www.qsl.netPlease help support this email list:
http://www.qsl.net/donate.htmlMessage delivered to
[hidden email]