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bias voltage at zero

  1. RogerMod

    When we bias a tube amp what are we measuring?

    There seems to be some confusion about biasing a tube amplifer. I would like to ask the readers here to give their thought on what are we adjusting and what are we measuring when we adjust a tube amplifer's bias. If one were discussing his amplifier with another person what would be the...
    • RogerMod
    • Thread
    • bias bias voltage bias voltage at zero idle current tube amps
    • Replies: 93
    • Forum: Tube Audio
  2. H

    Pioneer SX-1250 Original Bias at Zero

    I just finished my 3rd recap of Pioneer SX-1250. I recap 2 or 3 receivers per month, so I do a lot. After the recap and replacement of all 2SA725. 726, 750, and 2SC 1312 and 1313 transistors I naturally set the DC and Bias currents. What is surprising is that on both of the last 2 1250's, and an...
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