1kV GU50 PP 100W RMS amplifier from a SINGLE PAIR

[CaterpilarSK]

I have investigated the transformer windings and recalculated them for LTspice..
With the original configuration
8k Ra
33%UL
10%Ra CFB
and GU50s, the voltage gain is basically 0.93. So this is beyond unreasonable as I would have to provide a 1.2kV P-P audio signal for each grid. nu-uh.

There are to ways to go about it now, either reduce the CFB windings or delete them alltogether, And I think deleting it alltogether will be the smarter way to go about it as the GU50 already has an obismally low gain,

 

[Svytoslav]

think I can easily pull out 100W RMS out of a single pair.

112W

 

[nerdorama]

@Wavebourn published a 100W pp design using a pair of GU50’s several years ago.

 

[matejsirk]

This is for 75W, THD less than 0.1% at full power (simulation):

For 100W incrase B+ tu 550V-580V