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Epiphone Valve Junior OT upgrade -- help please???

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  • Epiphone Valve Junior OT upgrade -- help please???

    Just replaced the OT in my Valve Junior head -- I believe it's version 3 (black PCB).
    Using a ClassicTone 40-18030. Got everything wired up, but tubes are cold. Not sure what I did wrong.
    Wired the primary (brown, 5K) to T3 on the board; that is where the orig. OT's yellow wire -- 5.2K -- tied in. I wired the ClassicTone's red wire (common) to T4 on the board.
    Wired the green (8 ohm) tap to the tip on the mono jack; the black to ring.
    Amp powers up, tubes do not glow, and no sound.
    Help please.

  • #2
    If you wired the OT as per instructions that may not be the issue. Obviously the filaments aren't heating. That should have nothing to do with the OT circuit. Make sure you have voltage at the filament winding. Check for any disconnected leads.
    "Take two placebos, works twice as well." Enzo

    "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

    "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A


    • #3
      Thank you, Chuck. Will double, triple check all other connections on board -- perhaps I knocked something loose of something.
      Appreciate the help.


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