[Elecraft] Sudden loss of K3 RX sensitivity

[Keith Trinity WE6R]

Hi Pete;
RF gain up?
Adjust width to click thru all filters.
Does ATT/Pre change the sensitivity? (if not, it could be something in 
that circuit).
Try the RX antenna BNC input (if KXV3 equipped).
Try Ant 2 (if KAT3 equipped).
If good at RX ant, then most likely D26 or 27 on RF board.
If bad at RX ant too, then could be D5 on older KXV3 or D25 on RF board.
Email me, I have a flow-chart picture I can send you to help.
keith at elecraft.com  WE6R K3 Tech.