[R-390] r-390 power supply

[Roger Ruszkowski]

Fellows,
 
We need to look in the archives.
This has been done before and well.
 
Just solid stating the 6082's saves 32 watts of heat from the
filament heaters alone.
 
You can move some of the heat back over to the power supply.
Route B+ through any old 9 pin tube filaments in the 26Z5 sockets.
This will move 16 watts back into the power supply where the 
26Z5 use to be. Some other robust tubes would let you put
even more heat off the audio deck and on the power supply deck.
 
Just run the B+ some volts higher out of the solid state regulators
and spread that heat across the entire receiver.
 
You can use the unregulated B+ and build a reference voltage
with a string of zener diodes and use a couple robust pass transistors
for the regulation. As the 6082's are 8 pin octal you can make up
some plug in modules to get the job done.

An external fan goes a long way with or without other changes.

Roger AI4NI