• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Damper diodes (PY88 and similar) - Vdrop?

Does anybody have any data about the parameter in this thread's title?Factory-detailed or experimental?
The net and the catalogues I have on hand are stubbornly missing the Vdrop,as opposed to any other double rectifier.
I suspect that,for a tipical application (dumper diode),the Vdrop of a single rectifier tube isn't quite significant if at all.Still,it would be a hint about what to expect if someone decides to use a pair of these instead of a double rectifier.
Thank you!
S
 
They were known as Efficiency Diodes. The idea was to recover the excess power to increase the efficiency of the line output stage in the television by returning the flyback power to the power supply tank capacitor, usually 220nF at 1500volts DC.
When solid state television came along, there was a BY127 diode sat across the power supply choke winding to return unused power back to the main smoothing or tank capacitor.
 
  • Like
Reactions: Sorin Cristea