100W Ultimate Fidelity Amplifier

[apexaudio]

Originally Posted by maouna

this is the best i can get with my phone camera .its night here now.

i havent tested the psu yet.i will connect the 35A rectifier and put back the short circuit protection.

do you suggest 0.22ohm resistors for short circuit protection ? i am using a 24-0-24 volt /200VA transformer which is +-33 volt dc after rectification and smoothing capacitors.

Use 0.22ohm, with +/-33V DC no need for 35A rectifier you can use 10A.
66Vx10A=660W, and your amplifier will be 75W/4ohm with +/-33V rail voltage, 150W for both channels, with 70% eficiency of AB class you need 200W from PSU minimum, I recomended 300W, but 10A rectifier will be OK.
Regards

[apexaudio]

With 2x24v ac I use this amplifier:
TDA7294 Stereo/Bridge with PSU

[apexaudio]

AX14 also can work on +/-33V DC with same performanse and 75W/4R output power, I recomended TDA7294 just for begginers.

[maouna]

i will put the 8A rectifier and test the psu.but im afraid it will get too hot even at 4 amperes.

do you have tone control circuits?i would like to have one.

[apexaudio]

Originally Posted by maouna

i will put the 8A rectifier and test the psu.but im afraid it will get too hot even at 4 amperes.

do you have tone control circuits?i would like to have one.

You can put heatsink on 8A rectifier, tone control will be shared in thread:
http://www.diyaudio.com/forums/solid...q-preamps.html
Regards

[maouna]

thank you.

by the way, do you have one pair output amplifier design with opamp at the input?

do those amps sound good or is it better to have discrete components at the input instead of opamps?

[apexaudio]

Originally Posted by maouna

thank you.

by the way, do you have one pair output amplifier design with opamp at the input?

do those amps sound good or is it better to have discrete components at the input instead of opamps?

My PA amps use OP-amp at the input on the best possible way. I can't tell you anything about is it better sound than discrete, it's up to you.
Here is schematics of B50 with single darllington pair outputs.

[engel dela pena]

apex,
does this nchannel design has pcb,or where thread this came?

[apexaudio]

Originally Posted by engel dela pena

apex,
does this nchannel design has pcb,or where thread this came?

Yes, but this amp from thread: 150W MOSFET Amplifier with IRFP250x2 I recommended only for fun. If you want nmos amp I sugest to build an ARCAM clone.
Regards

[engel dela pena]

apex,
do you have this arcam clone design
regards