I have a Bodnar dual output GPSDO although I don't use it on my K3S.  Be advised that the software is very clunky and while you can get two different frequencies out, there are limitations on what they can be.

Frankly, I don't know why you would want something like this for the K3(S).  The high stability TCXO is fine if you leave the radio powered continuously as I do, otherwise, it's quite good after about a 20 minute warmup.  Use your counter to measure the TCXO directly and adjust the ref cal parameter manually.

Wes  N7WS


On 2/5/2020 12:48 PM, Dave Van Wallaghen wrote:
Hi Gary,

Here is the one I use: http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=107&products_id=234

It feeds my K3 and I also use the other port to calibrate the oscillator for the main MCU on all the K2's I service.

73,
Dave, W8FGU


On 2/5/2020 2:43:46 PM, "Gary Peterson" <[email protected]> wrote:

Does anyone have any recommendations for a particular 10 MHz GPS disciplined oscillator that would work well as an external reference for a K3S?  I might also use a GPSDO as an external time base for my frequency counter.  Either recommendations or products one should avoid would be most appreciated.  Feel free to reply off list.

Thanks in advance.

Gary, K0CX
[email protected]

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