[Elecraft] K2 40 Meter Problem

[Dave Agsten]

My brother is working on an intermittent problem with 40 meter receive. It started out with 40 meters going almost dead. Tapping on the chassis would return the receive function to normal for awhile. He just opened up the radio and tried to track down the problem. The KXV60 board, when tapped, would, make the problem disappear. He removed the board and narrowed the problem down to the 40 meter bandpass filter area. He looked at the solder joints and did not see any that looked bad. He's going to look those over again with more light and a bigger magnifying glass. Then, if he doesn't find anything, he will reheat all of the solder joints. He says that it seems most likely that the problem is around L1 and L2 since when he taps in that area, the problem goes away and then comes back. It may be the transformers, a relay or some other component. Hopefully, he'll find a bad solder joint or reheating them all will solve the problem. I'm wondering if anyone has
 possible solutions, a way to narrow the problem down further or any suggestions.

Tnx es 73,
Dave N8AG