Experimental amplifier with tubes PWL

In this circuit are used the tubes manufactured by PWL.

The diagram circuit is shown in fig.1. The first stage works with triode type T01. The gain factor of this stage is ca.6. The power stage works with experimetal tube type T02. The parameters of this tube:
  • filament voltage 9,5V
  • filament current 1,5A
  • transconductance ca.0,65mA/V
  • gain factor ca.10
  • power dissipation ca. 3,5W
    The power from amplifier is ca.1W max. Negaitive feed back is connected with shield the tube T01. As regulator of filament current is used vacuum device type RR1 PWL. It's 4 section resistor.


    Fig1. Diagram circuit

     

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