tesseract
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@jeroenj_1989 I use 3x MJ11016 Transistors. I used 3 Transistors because i need 5A. The powertransistors on heatsink. The transistors are paralell copuled. And so i have on the PCB only 3 conections.
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is this capacitor Ok ? http://www.reichelt.de/?;ACTION=3;LA=2;GROUP=B326;GROUPID=3155;ARTICLE=12380;START=0;SORT=artnr;OFFSET=100;SID=28HyyhlKwQARwAAAxcL@0017dd4cf916edddf0991c5990ba93c2d
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@audioguru, I'll give you absolutely right, it may be the original PSU has errors, but i built it for about 2 years ?? ( with TL081, 1x2N3055 and i have used the shown PCB ) and it's work fine !
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Yes you have right, that is my problem, RS sell only to a company. But i found someone and he ordered it for me. I must wait only a few days and i have the parts. You have right it is possible to rotate D9 and eliminate the wire, but it does not change much.... @GrahamG i check the old version of PSU and and it is possible to adjust the voltage up to 0.0 volt.
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oh...the 0V problem...i have not noticed it because i don't use lower voltage than 3 volt. If i go home i check this with the old version, the new one is not finished yet.
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I built the original version about two years ago ( with the Voltmeter + Ammeter LCD panel ) and it works wery good, but now i need some more power and i decided to built the new version with the 5 A output ( it is possible to become 7A with more powertransistors ? I have a 30V~ / 10 A trafo ). I used EAGLE ( i don't make publicity for EAGLE !! ) to make a single PCB layer with only 3 wire on top of PCB. The C1 ( 2x10.000 30V_5A_PSU_Eagle.zip Pictures.zip