Looking for anyone who may have had this issue......... Tube sockets just replaced. Tubes are new and have switched them around. Still popping !All I can assume is that it's the right attenuator. Any other options out there !
If B+ voltage somehow got into the signal path(very unlikely even with blown tube) it may've damaged the coupling cap. Other than that I don't see the reason why coupling cap is the culprit.
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