[Elecraft] K2 noise on receiver when switching from transmit

[Mike Fanning]

Hi all,
I have a K2 that I built some time ago that I added the KPA100 to at a later time.  I don’t have more than 10 minutes worth of run time on the KPA100 and I’m putting a dress rehearsal together for Field Day in a couple of weeks.  I noticed tonight that when I am running more than about 10 Watts (enough to kick the KPA100 on) that I get a nasty pop on the receiver whenever I come from transmit to receive mode.  Changing the tx-rx delay doesn’t affect the noise, and whenever I back the power down so that the KPA100 is not engaged, the problem goes away.  Any suggestions as to what might be going on?  It will be really tiring to listen to the receiver in this mode for 24 hours at FD…

Thanks for any light anyone can shed.

73,
Mike, K4GU