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    JCM 2000 DSL 100 Bias drift issue

    Update. The bias drift issue was fixed, by moving all the bias circuit parts to a dedicated PCB. The pin 5 holes were drilled for the powertubes of course. Tnx to all for the input.
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    JCM 2000 DSL 100 Bias drift issue

    The bias pots are also new.
  3. A

    JCM 2000 DSL 100 Bias drift issue

    R6 and R9 were already replaced. Also the PI coupling caps. Will try the 16 ohm tap ground mod. Tnx for suggestion.
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    JCM 2000 DSL 100 Bias drift issue

  5. A

    JCM 2000 DSL 100 Bias drift issue

    Hello, I can't seem to solve the bias drift issue on my JCM 2000 DSL100. The amp is a 1998 model. Main board JCM2-60-02 Issue 5. The things already done to remedy the problem: Everything in this post : http://www.hullerum.de/Marshall/TSL122repair.html Drilled pin5 on the power tubes, replaced...

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