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k-100

  1. daylite

    Transistor-Buffered Zener Regulated Bias Voltage Supply

    A bias voltage design for TA-500, K-100, 500 Mono that's suitable for vintage & modern output tubes. There have been several discussions of the design of the Fisher “bias-voltage from heater-string” method that Fisher used to generate the negative potential needed to bias output tubes. Dave...
    • daylite
    • Thread
    • 500 mono bias adjustment bias voltage ibam k-100 ta-500
    • Replies: 3
    • Forum: Fisher
  2. daylite

    Mono 500 and K-100 Comparison

    <------Update: I found a knob for this guy! TA 500 vs K-100 schematic comparison............Post #1 Under-chassis photographic comparison...........Post #16 The Model 500 Mono is >95% the same at the K-100 chassis used in some Fisher consoles. The Sams Model 500 service manual is 100x...
    • daylite
    • Thread
    • 500 mono k-100 ta-500
    • Replies: 24
    • Forum: Fisher
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