[Elecraft] Strange receive problem

[Joseph Reed]

I have been pulling my hair out for about a month with this problem, and perhaps someone has seen it before and can point me on the right path.
   
  I have an issue on 30m receive only.  When I transmit on 30m I get full power, and it receives normal,  but after a while it loses most of its sensitivity.  Transmit again and it will hear the other side of the earth.  I have noticed that once it goes partially deaf I can get a High Curr indication on the first dash I send, but after that it puts out full power with no complaints and of course after every transmission it is that beautiful K2 receive.
   
  Here is the kicker - 20m is great.  The only difference in the LPF is K3 switches out some capacitors.  I have resoldered all the connections, and replaced K3 (bought a Hakko 808 just to do it).
   
  I think we can eliminate the BPF as nothing changes in it for either 30 or 20.  And since I replaced K3, I am beginning to give up hope that it is something in the LPF.
   
  Guys, I'm running out of ideas.  These are latching relays so it isn't like they can partially break contact.  Help!
   
  Thanks,
  Joe N9JR