Hi All, I would like to draw on the wisdom of the group here. My R4-C seems to be developing a sort of frying noise when I am listening. It is really apparent on SSB but also now is getting worse on AM as well. It does not seem to effect audio quality but is running competition at times with the received signal. Does anyone have an idea what this might be? Someone mentioned that there is a particular tube, perhaps a 6EJ7, that gets gassy and can cause this. Any thoughts? Thanks all and very 73. Kevin :) Amateur Radio: K7RX
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