Ok, so I have a 15W bulb in series with the P/S and it lit up. The fan didn't start blowing until the second time I powered up, but its blowing, albeit very slowly due to the limited power I assume. I didn't go the full Tony route because doing so would've required desoldering the entire transformer which wasn't an attractive prospect. I measured the voltages across a power connector and got 9.4V, +17.56 and -17.86. A little high but I attribute that to a lack of a load. At this point I feel pretty comfortable that the P/S is working pretty well, which surprised me. I expected a fight (but was hoping for the results I got). These old machines just refuse to die. I'm going to let it warm up for about an hour before I start plugging in boards. Thanks to Dave, Tony and Tim for your help!! Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. September 26 & 27...Vintage Computer Festival 2.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/12/98]