My MOSFET amplifier designed for music.

[masood]

dear mooly,
thanks for sending these file plz.also send the pcb silk mooly b&w pdf .yes i am mad.to achieve some thing i only request .thanks masood

[Mooly]

They are fantastic PCB's Alex.. absolutely top job

[Mooly]

Originally Posted by masood

dear mooly,
thanks for sending these file plz.also send the pcb silk mooly b&w pdf .yes i am mad.to achieve some thing i only request .thanks masood

It is Alex you should be thanking for those, not me

[masood]

dear alex and mooly,
sorry,thanks both of you for sending these files plz.also send the pcb silk mooly b&w pdf .yes i am mad.to achieve some thing is not sin.it is only my request . thanks your's masood

[warrior007]

can i use +/-65vdc for this amplifier? do i need to modify something to used this supply thnx!

[Mooly]

Originally Posted by warrior007

can i use +/-65vdc for this amplifier? do i need to modify something to used this supply thnx!

Hmmm... thats high.

The basic topology would be fine. The VAS transistor and its current source would need different devices as their max rated dissipation would be exceeded. Perhaps TO126 types on small heatsinks for these. The laterals would be OK but the extra voltage means they are are going to see their dissipation rise so using 2 pairs per channel would be necessary. It would perhaps make sense to go to the 200V ones available from the likes of SEMELAB and Exicon/Profussion.

On any amplifier, when the supplies increase things start to get hot very quickly.

[Mooly]

Originally Posted by masood

dear alex and mooly,
sorry,thanks both of you for sending these files plz.also send the pcb silk mooly b&w pdf .yes i am mad.to achieve some thing is not sin.it is only my request . thanks your's masood

The only PCB designs that I have are those already on this thread

[warrior007]

@Mooly
thnx, i will be using using 2SA1837\2SC4793

[Nico Ras]

Mooly, I noticed the 0.22 watt series resistor in the output - reason being?

[Mooly]

Originally Posted by Nico Ras

Mooly, I noticed the 0.22 watt series resistor in the output - reason being?

Hi Nico
Two reasons.
One was to supposedly emulate the higher output impedance of valve gear. The other was that 0.22 ohms alone is pretty much sufficient in itself to isolate the amp from capacitive loads (cables etc) even without the use of an output inductor although in the final design I included both.