[Amps] tetrode reverse screen grid current

[John Lyles]

Problem is, most electronic regulators are not designed to be both 
source and sink capable. That's why it was suggested to add a heavy 
bleeder, that tames the regulator circuit by allowing it to deliver 
constant current instead of shifting modes.

We used to use 4CX1500B as a screen regulator for a 4CW100,000D pulse 
modulator and also for the Burle 4616 RF tetrode. All that was ripped 
out in 1994, when we switched to a MOSFET hard switch for screen pulsing 
and a heavy bleeder, and got rid of the plate modulation.Before that, 
the poor 1500B couldn't drive the desired bleeder value without running 
out of steam.


Paul Kraemer wrote:
> There is another solution?
> Electronically regulated supply?
> Paul K0UYA