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RE: Dynaco 400 amplifier problems,

Just thought I'd mention, GP49, that awhile back, I bought semiconductor repair kits from an e-bay vendor for both PC-28 and PC-29 boards. Of course, all of the original transistors have been replaced, presumably with better parts. With the one I built in 1975, aside from the original power switch having developed a short in it, one of my bigger concerns was the 10-watt resistors on PC-30 getting too hot. That question was addressed on this forum earlier, so I might have a good solution for that problem. Back to original point, I have no intention of bypassing anything in any of the ST-400's that I have, although on one I picked up on e-bay last year, I noticed that input volume controls had been bypassed, and also noticed some film caps on the back of the PC-28 boards, I just haven't gotten into any of them yet.
Mark

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