100W mosfet amplifier with IRFP250 - Help!?

[radio]

Originally Posted by kenpeter

R17, 18, 19 all need to be the same value, if T7 is going drive in symmetry with T6. But negative swings would be hurting for lack of bootstrap twice as soon as positive swings, is this why a symmetrical quasi was not used?

Do you need all the resistors (R17, R18 and R19) to be the same?
Real opinions, ...
thanks

[kenpeter]

Correction for error between VAS and output will be driving lower MOSFET 4.5x as hard.
Not so different from single ended with a CCS. I mean, top MOSFET is driven and active,
definitely not a constant current. But not nearly so active as the bottom MOSFET.

If the above behavior is acceptable: No, they don't need to be the same.
And you will run out of headroom on the bottom much sooner if you fix it,
so there is at least one good reason not to fix it.

[NMOS]

please go to "quasi" power amp under development

there is perfectly NMOS working up to 1 KW RMS @ 4 OHM


universal circuit you can drive MOSFETS or BJTs

have build some pcs. and works perfectly with great sound


can email schematic and PCB layout

[saw audio]

hello nmos can you send me pcb drawing of 1kw@4ohm man.harpreetsingh72@gmail.com thanks