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My 101zd was about 10db down on rx. I went down the troubleshooting road and cleaned all the relays I could find and checked the lamp fuse.?
Wound up changing the first rf amp and it came back to life.?
George NE2I?

Interesting. My 101Z suddenly became 'deaf' some time ago.? After a lot of investigion work I came to the conclusion that? the first RF Amp device had likely failed.? I am a little reluctant to start desoldering etc as the rig is in 42 years old original untouched condition.? Were yuu able to source a genuing 3SK51 (or use an equivalent?) I cannot find one on internet but I understand that a 40673 will work.? Any frther information on your rix would be appreciated.? Thanks Al GM4ENF.