Generating a bias voltage with PT without Bias Tap

Assume we have a power transformer without bias tap and we want to generate a bias supply.

This example is based on a 4 diodes supply, PSPICE simulation. As always, we must prototype to validate the model …

Schematic :

Schematic bias supply tube ampPlease note :

  • R2 (1Ω) not needed (only for current measurement during the simulation)
  • R8 + R9 = a 100k lin pot

Current consumption :

Current Bias tube amp

Bias voltage :

vBias tube amp

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