[Elecraft] K3 Receiver Sensitivity Problem

[Jim Garland]

Yesterday I discovered a loss of receiver sensitivity of about 30dB in my K3
(s/n 1217). The problem (which shows on the S-meter also) is on all bands
and affects both the main and sub-receivers, and also is present on both
ANT1, ANT2 and the SubRX antenna jacks. It also is independent of the
antenna tuner.  All else seems to work normally, including the transmitter.
I looked at the near-incomprehensible block diagram for the K3, but couldn't
find any obvious points of commonality between the main and sub-receivers
that might indicate where the fault is located. Any suggestions about what
to look for??   

 

Tnx,

Jim W8ZR