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:
[email protected]
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