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Fender Twin Reverb Reissue distorted reverb

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  • #16
    @mwjb - gotcha. Ill have to look on monday when i have the amp in front of me. but back to the original topic, these 2 missing wires would have nothing to do with the distorted reverb, right?

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    • #17
      There should be a dozen yelow wires...it depends where they are missing from? All the tubes have at least one yellow wire that should terminate on the PCB somewhere. Where are your yellow wires missing from?

      There wouldn't necessarily have been anything connected to C33/C34.

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      • #18
        They the 2 yellow wires both marked K all the way on the top right corner of the pcb. The question is where the other end of those 2 wires land. Can you post the picture or link for the picture or pm it to me

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        • #19
          "top right corner of the pcb"...OK, I can't see which way round you have the chassis, orient the chassis so that the tubes & speaker jacks are nearest you & the control panel is away from you. Where are the "missing" wires now?

          Google "65 Twin PCB" and an image pops up. That's what I'm looking at.

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          • #20
            If with the chassis oriented as described above, the wires marked "K" are between "G2/G2/G1/G1" & the "HTR" wires, then these appear to be the cathode wires from the power tubes. The power tubes may have been grounded at the sockets by a prvious tech, or 1ohm cathode resistors added for easier bias readings...confirm what is connected to pin 8 of the 6L6s.

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            • #21
              nothing "popped up" on google web or images search for me, but i understand what you're talking about. i will investigate what was changed on monday........thanks for digging for me!!

              anybody have any other thoughts on the original reverb issue............?

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              • #22
                The yellow wires go to the output tubes, pin 8, the cathodes.
                As stated, someone may have added 1 ohm resistors from the cathodes to ground.
                If the cathodes where not grounded in any fashion, the output stage would not work.
                Photo Link: http://www.google.com/imgres?imgurl=...13&tx=51&ty=42

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