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Vintage Synth Repair

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Re: [vintagesynthrepair] Re: ARP 2600 PSU, pt. 2. electric boogaloo.

2008-09-25 by mariano elizalde

..tell you what, maybe I can locate a 14 pin lm748 locally, have some contacts :]...  if I can I'll pass it to you, respect the tip series, the tip125 ($0.89 at BG MICRO ) is the complementary to the tip120 ($0.79... lied to you on previous post) but like I said, their pinout I believe is reversed respect to the original ones, also the transistor case is slightly different and they might need a different mounting method since their collectors are tied to the metal flange.  will check tonite some of my old manuals on transistors to make sure. is there an image of the power supply showing the components and the coper traces? like a component layout or something like it that perhaps you can upload to the archives... that would help to troubleshoot further. I.m looking n alternate part for the opamp meantime...

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