[Elecraft] K2 Muting

[Don Wilhelm]

Bob,

This was discussed some time back, but I can't find the details at the
moment.  The essentials follow:

You can dig into the K2 and find the /MUTE line (on the Control Board) that
goes from the microprocessor to the muting FETs Q6 and Q7.  Insert a series
resistor in this line (try 2.2k and experiment lower from there, using the
highest value that allows K2 to mute normally with this resistor inserted),
and bring your external muting line into the K2 such that the gates of Q6
and Q7 are grounded when you wish to mute the K2 from the external control
source (open for normal operation).

This will mute the audio - keeping RF out of the non-transmitting K2 is
another matter.

73,
Don W3FPR

> -----Original Message-----
>
> I want to switch between a K2 and another XCVR.  When I am transmitting on
> the other XCVR, the K2 should be muted.  Can someone enlighten me
> as to how
> best to mute the K2 (other than keying the transmit line)?  Thanks,  Bob
> N7UA
>
>