Nekro

Audioguru, I just cannot get suggested OPs. What about old, good OP07? It's 44V amp...everything seems to be OK - the only parameter which is not too much impressive is slew rate. Advise please. Thank you.

It turned out that D7 0,4W is OK. Previously, I ran simulation using different voltage source - skipped rectifier and C2 and put there DC sources. No issue. I am going to build 5A version, using 3 BD249 (no wires to heatsink). When I finish PCB design and put everything together, I'll report results and publicate layout.

Hello from Poland! 1.I found that OPA37 or OPA27 may be also used (OPA37 is slightly faster) - not tested. The only thing making me a bit sceptical is whether limitation concerning differential input voltage might be an obstacle. Audioguru, look at it please (just in case) as those two are far more available (in my "area") than all the other ICs suggested before. 2.I am just curious if it's not a good idea to use 0.1 Ohm as R7 (less heating) and replace other parts so that regulators would work properly... 3.I run that circuitry in Spice and looks there is app. 0,42W disspitation at D7. I guess it was suggested to use 0,4W zener diode... Anybody occoured any problem? Big thanks to Audioguru for contribution!