HISPID

Thanks audioguru. Operational amplifiers OP07CP won't be destroyed, because their maximum voltage + - 22V (total 44V), I attached screenshot from the specification. Yes I agree that in the original scheme there are voltage losses, and some parts become hot. But with small corrections (replacement of some parts by more powerful analogs) it will work. And it works for many users who built the original scheme. I have forgotten to mention that i have not polyester C4, C5. And i used their ceramic analog. Whether there can be a problem in it?? I think that isn't present...

All sources are included in link to *.zip file below. PCBs are in *.lay format (Sprint Layout 5.0). - original PCB with OpAmp OP07CP correction - PCB for parallel connection of 2N3055 or MJE3055 PSULay.zip

Hi all! Sorry for my bad English. I decided to build this PSU under the original scheme. I consider that the original scheme is not too bad, if to make small corrections. My corrections in the original scheme: - Replacement of C1 by more capacious 8200mf 63V - Use of two MJE3055T in parallel connection - Use of operational amplifiers OP07CP U1, U2, U3 - Use of BD139 in Q2 * For use of operational amplifier OP07CP (U2) in the original scheme, I have changed in places contacts 5 and 8, look at the picture below. * Also for parallel connection MJE3055T, I have made the small PCB, look at the picture below (7,8,9 are contacts on PCB). As a result when all has been done, nothing works :(. Target voltage regulates from 0 to 0,65 volt, and U2 strongly heats up. Also strongly heats up R1, R2, i think replacing them with more powerful resistors will solve the problem of their heating. My actions: - Before soldering, all parts were checked on serviceability. So all of them were in working order. - I have checked PCB on a possible cracks, but found nothing. - After soldering, i have checked polarity of all parts, all is established correctly. - I have checked all connections with tester (multimetr). All in contact! Help me please! I do not know where can be a problem? Can be some part burned down? Though there are no traces of ignition. Unsolder all parts and to check them, there is no desire.