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

[Jim Miller]

Ray

That is indeed the protective relay on the RX Ant port. You should find a
way to protect the RX Ant port from your TX signal.

There are many products in the market for his purpose. Not sure of the best
choice on your side of the Atlantic.

73

jim ab3cv

On Sat, Feb 1, 2020 at 5:23 PM raycollins <ray at collins05.plus.com> 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
>
>
>
> --
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