[Elecraft] K3S relay noise when using Rx ANT IN port

[john at kk9a.com]

I would cease operating with the RX antenna connected immediately  
before you damage your transceiver. 10m antenna separation is very  
close. I has a similar situation at my P40A station so I shorted the  
RX coax with a relay during transmit.

GL,
John KK9A

M1FJL wrote:

My K3S is configured to use the RX ANT IN port for a separate Rx antenna.
However, on SSB transmissions I can hear an internal relay operating in
synchronism with peaks in transmit power.  I assume this is a relay in the
receiver input protection circuit?

Is operation of the relay in this manner normal? Apart from finding the
noise rather irritating I am concerned about the reliability of the relay
when it is called upon to operate so many times during a QSO.

The Tx and Rx antennas are about 10 metres apart and I am transmitting 100
Watts.

Thanks for your help,

Ray M1FJL