Recent content by egres

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    0-30 Vdc Stabilized Power Supply

    AG, thats ok, i thought something with fonts will be wrong :) well.. i am sure you know that those bulbs must be cooled.. atkeast with air.. when i wired it in series, and connected 24 volts for few seconds, it did not blew up, but my table is a little brown in that place :D .. and the bulb...
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    0-30 Vdc Stabilized Power Supply

    and a video, thats all, thanks for your attention :) egres pc050163.rar
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    0-30 Vdc Stabilized Power Supply

    two more:
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    0-30 Vdc Stabilized Power Supply

    hi everybody.. here are some photos of mine power supply.. no housing yet, but few "tests" list of changes: (partlist by audioguru, the tuned one, but few parts changed) power transistors: -a pair of BD249C (100V, 25A, 40A_peak, 125W at 25
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    0-30 Vdc Stabilized Power Supply

    and by the way... looking at yours wattage : 32*3=96W and mine: (34-14)*2=40W is mine wrong? is the heat going to a heatsink determined by U*I ? or (U(source)-U(load))*I? egres
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    0-30 Vdc Stabilized Power Supply

    well, the transistor was hot when i managed to connect 12V bulb on it.. i set 14V on supply, and the current was 2A.. so (BIG 500VA transformer with 4 primary wires.. output can be 24,27 or 30 Volts.. set on 27Volts) -> after diodes it is cca 34Volts.. 34-14=20 -> "unused" voltage  20*2=40...
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    0-30 Vdc Stabilized Power Supply

    well... i have just finished mine.. if i wasnt a bit stupid, it could work on a first attempt ::) i have bought two BD241C as Q1 and Q2 and two 7805 stabilizators for voltmeter and ampermeter... i dont know how, but i soldered 7805 in a place of Q1, and i spent 4 hours checking everything  ::)...
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    0-30 Vdc Stabilized Power Supply

    one more question.. ive got twenty high-quality potentiometers, but they are 100K.. how can i modify the power supply to use them? thx, egres
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    0-30 Vdc Stabilized Power Supply

    excellent, exactly what i wanted to know.. thank you, audioguru i will find your part list in the forum, i dont want to misuse yourself  ;) and by the way... i was looking at the 5A version in the forum.. the changes are not that big i expected, but i think i will start with 3A.. thanks again
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    0-30 Vdc Stabilized Power Supply

    hi guys, i am new here, (but i have been watching your forums for a couple of weeks) and i found that power supply very interesting.. i have got a big transformer from broken UPS, output is 24volts (hehe, 400-500VA :P, so maybe it is a good idea to build hmm.. lets say.. 10A supply in the...
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