Hi,
I'm working on an old Tube amp and I have a problem I need help with.
This amp uses a 20w 8k power resistor as a bleeder for the screens on the output tubes. The design has this resistor dissipating 18watts.
I want to replace it as it is severely under rated, I also would like to eliminate the heat associated with this device
I would like to use a zener string to provide the necessary voltage drop but I'm having trouble getting my mind around the problem.
The screens are at +380Vdc
The current is at .046amps
The dissipation is 17.48 watts
Thanks for any comments or direction on how to work this out!
Chris
I'm working on an old Tube amp and I have a problem I need help with.
This amp uses a 20w 8k power resistor as a bleeder for the screens on the output tubes. The design has this resistor dissipating 18watts.
I want to replace it as it is severely under rated, I also would like to eliminate the heat associated with this device
I would like to use a zener string to provide the necessary voltage drop but I'm having trouble getting my mind around the problem.
The screens are at +380Vdc
The current is at .046amps
The dissipation is 17.48 watts
Thanks for any comments or direction on how to work this out!
Chris