[Elecraft] K3 goes deaf when set to 12W or more

[Martin Schmiedel]

Elecrafters,

K3 #8862 ,  goes deaf when i set power to more than 12W . XMIT (TUNE) 
will not output power if TUN PWR is set to more than 12W.

I hear a relay click ( KPA kicks in) when power setting transitions from 
12W to 13W and rx is gone. It seems to work normal when PWR is less than 
13W (aka the 10W PA is in use) .


Where to look?

Thanks.

Martin, DM4iM