voltage doubler

[clayman]

I have a converted bogen chb100,w the stock power supply putting 450v on the 7868 plates.Can I change the diodes to a plexi type rectifier,and do away with the voltage doubler,thus dropping the power supply voltage.As I understand the data sheet the 7868 will run on 300v-350v.The pt puts out 275v bfore rectification on each side.I am looking for a warmer tone and have tweaked the front end alot,it's pretty in your face.

[loudthud]

I found this schematic:

http://www.schematicheaven.com/hifia...gen_chb100.pdf

Where and how are you measuring 275V? I would think a full wave bridge would give something less than 300V. It might not be what the tube manual calls for but you should get something like 20-30 watts out of it so give it a try.