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.
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.
Did it live up to the expectation? You also limited the Damping Factor but some attach lesser snake oil to it.
Absolutely
I've always been totally happy with the overall subjective performance. You can experiment and tweak ad-infinitum but this amp does what the design brief set out to achieve. It makes music and never fails to delight on that score.Enjoy
Absolutely
Enjoy
Hi Mooly,
Can I use darlington for the output?
Thanks,
Boyet
Not easily. It would require considerable reworking of the driver and bias sections. The lateral FET's and their ease of drive is one of the amps main features... and one of the reasons it sounds as good as it does.
Hi Mooly,
Sorry for the wrong question..it is not intended for this question in this amp. Sorry.
Regards,
Boyet
No problem
Hi Mooly,
For now I print the pdf layout by alexmm. I want to build this one. Thank you for this design.
Regards,
Boyet