I'm an experienced tube swapper but this has me baffled.
In my Ht Club 40 Mkii, i'm trying to replace the clean channel pre-amp tube but it simply will not work with completely fine tubes.
I remove the Sovtek 12AX7WA that's in the socket, and replace it with a 12AX7 tube i know to be working (and I tried at least four of them) but i get no sound.
I can use any of those tubes in the dirty channel socket and they all work fine.
I put the Sovtek back in the clean channel socket and PRESTO - I get sound!
Has anyone experienced this before and what was the fix?
I want to experiment with a Tung Sol or Ruby 12AX7 and i appear to be stuck with the stock tube.
General Discussion Forum - Voice The Sound In Your Head
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