[Elecraft] K3 intermittent RX drop-out

[Don Wilhelm]

Stefan,

You have not only the K3 in the receive path, but also the transverter, 
coax, and perhaps a sequencer.

Have you tried changing the coax to the transverter IN jack?
Often problems of that nature are caused by faulty coax.
Have you ruled out a bad contact in your transverter or other external 
switching?
Does the K3 receive at your IF frequency if an antenna is connected to 
the SO-239 jack?

If you have an alternate source of 28 MHz signal (signal generator or an 
antenna that will receive even noise on 28 MHz), try connecting that to 
the K3 transverter input to see if the problem is in the K3 or something 
external.

73,
Don W3FPR

On 5/24/2014 4:42 AM, Stefan Heck wrote:
> Hi gents,
>
> Since fall 2011 I am happy to own the basic version of the K3, with the only
> extras being the KXV3A transverter interface, some CW filter and the KDVR3
> voice recorder. I have been using the K3 once or twice each month only as IF
> unit for a 2 m XVTR. So I am not using the SO-239 rear socket. The K3 worked
> very fine for almost 2 years but started then to exhibit intermittent
> drop-outs of the RX signal. The path was not completely gone, just had extra
> attenuation of 30-40 dB. Transmission seemed never affected. Initially it
> resembled a hanging contact of a T/R-relay, and could be cured by pushing
> the PTT once or twice.
>
>   
>