On 9/30/09, M H Stein <firstname.lastname@example.org> wrote: > Pretty straightforward: > > pins 1 and 5 are the ends of a center-tapped secondary... Ah... there's the magic phrase. I wasn't thinking of center-tapped, so I was having visualization problems. > The 320008-2 schematic is correct for the board. Right. That I knew. > If you've got ~9V DC available, just feed 9VDC to pins 2 and 3. I don't have ~9VDC at 2-3A lying around. > If you're going to use a PC-type PS, I'd pull the regulators (if they're not > still out) and run regulated 5V to the 4 Vcc points and drop the 12V > to ~9 with a regulator or Zener and connect to pin 2. Right... they _are_ still out, though I've cleaned everything up. I probably have a 7809 lying around somewhere (I do save such things when I find them in CD players and consumer devices). I was really just contemplating how to restore the board to work in a real PET, mostly because of the video issue - I never did get that simple video circuit to lock on the signal from the 3032 last year. I did _see_ the ROM BASIC splash message, but on a bog-standard Panasonic B&W "security monitor" (that works with an 1802 and 1861, BTW), I could never get the video stable left-to-right. > But I accept no liability ;-) That's OK. Your initial comment and the follow-up picture explains it all to me. I saw the brown wires to the 5-pin plug and got about 18VAC from it, but never put 2+2 and figured "center-tap". Thanks! -ethan Message was sent through the cbm-hackers mailing listReceived on 2009-10-01 02:00:28
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