"Carter-k8vt" wrote in message
t...

The 268 volts you are seeing on each plate is 268 volts -AC- to ground; to
put it another way, you are looking at a transformer with a 268-0-268
volt secondary (or a transformer with a 536 volt *center-tapped*
secondary).

I've got that part - thanks for confirming.

The 265 volts you refer to is +265 volts -DC-, measured from the filament
(cathode) to ground. The voltage -across- the 5U4 filament is 5 volts AC,
the filament voltage of a 5U4.

So I need to apply 5V AC across the filament (pins 2 and 8). That's
consistent with what my understanding would have been. And the 265V is
generated by the tube, correct? This would be a pulsed DC, would it not,
coming directly off the tube? In circuit, it is constant DC due to the
filter capacitors? Do I understand this correctly?

By the very nature of your question, it indicates that you are a
beginner -- which is OK; we were all beginners at one time. Just be
careful; these voltages, if not fatal, can at least be harmful.

Yes, relative to almost all of you, I am indeed a relative beginner. And
this is my first experience with a transformer/rectifier-based radio, so I
apologize if my questions are somewhat stupid.

Jeff