Guys You have been awesome supporting this project. I have built this PSU (see attached) but need some help! I have a step-down transformer with 2x75VA secondary windings. If I connect them in series I get 34.0v AC and 52.0v rectified. This I think is too much for the OPA445s, in fact I know it is because 2 of them blew up after I connected it ;D As a test for the circuit, I disconnected one of the secondary windings and replaced my dead OPA445s with 60p TL081s. With P1 cranked up, I measured
[email protected] across pins 3 and 4 8) With the 2 windings connected, the reference voltage is ok - 5.6v appearing across D8 - and 11.v at pin 6 of U1. U2 is not happy though, he gets an input voltage at pin 3 proportional to P1's setting but nothing at pin 6. What's my best bet? Upgrade R1? If so, what to? Thanks fellas spy
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