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Please note I edited the previous reply- the 220k resistor should connect from B+ to the top lug of the 100k pot, NOT ground to the top lug.
String should look like this:
B+ node-220k r-100k pot-gnd
bias side of things like this:
grid of PI triode-1meg r-center lug of 100k pot-5uf cap-ground
The - represents a soldered connection.
The center lug of the pot will end up largely toward one end.
Let's say the supply voltage was 400 volts. The plate of the triode should be at around 300, the cathode at 100, for starters. That'll get you up and running, you can tweak by ear or with a scope later, if you have a scope.
jamie
String should look like this:
B+ node-220k r-100k pot-gnd
bias side of things like this:
grid of PI triode-1meg r-center lug of 100k pot-5uf cap-ground
The - represents a soldered connection.
The center lug of the pot will end up largely toward one end.
Let's say the supply voltage was 400 volts. The plate of the triode should be at around 300, the cathode at 100, for starters. That'll get you up and running, you can tweak by ear or with a scope later, if you have a scope.
jamie
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