[Elecraft] [K3] K3EXREF not working

[Steve Lund]

I just noticed that my K3 frequency is approximately 50 Hz off.

I have the K3EXREF installed and the external 10 MHz is supplying +10 dBm
to the rear panel connector. The 10 MHz appears to be 3 Hz low according to
my counter and spectrum analyzer. Is this too much?

One recent change is that I installed the K3SYN3A a few months ago. I
didn't check to see if the K3EXREF was locking to the external reference.

Any ideas on how to troubleshoot this?

Thanks,
Steve, K6UM