[Elecraft] Cheap ref osc to lock K3

[Sverre Holm (LA3ZA)]

My experience is that the simple GPS-based 10 MHz reference works well with
the K3. The K3 is quoted as measuring frequency to 1 Hz accuracy, implying a
measurement time of the order of 1 second. That seems to be enough to smooth
out the jitter from the Neo-7M.

Of course,  there are better solutions around, but why spend money on
something which is unnecessary?

My experience including build instructions was posted on my blog yesterday:
http://la3za.blogspot.no/2015/10/just-good-enough-10-mhz-reference.html




vk2rq wrote
> I bought a module like that. If you set the output frequency to something
> that divides evenly into 48MHz, then the output is quite stable.
> Otherwise, if you set it to something else like 10MHz, the jitter is quite
> obvious on the scope. It is fine for jobs like calibrating a frequency
> counter or zero-beating a transceiver. You'd probably want to smooth out
> the jitter though if you want to use it for a K3 reference oscillator.
> 73, Matt VK2RQ





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Sverre, LA3ZA

K2 #2198, K3 #3391,
LA3ZA Blog: http://la3za.blogspot.com,
LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html
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