HELP! Amp making no sound + squeal

Discussion in 'The Workbench' started by JM5010, Nov 25, 2019.

  1. neikeel

    neikeel Well-Known Member

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    Depends on your plate voltage and current draw.
    Remember that pin 5 voltage is negative. The less negative the hotter it is.
    If your plate voltage is 450v and they are EL34s then -45 is a ball park figure.
     
    Last edited: Dec 6, 2019
    JM5010 likes this.
  2. JM5010

    JM5010 Active Member

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    Thanks, i’ll rebias to -45V.
     

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