I first posted about this a few years ago (yikes 10! ) but never made any progress. Sometimes life just happens... To the point- I (still) have a SPEC-4 that goes into protect mode after turning it on. In a very old message to EW it was suggested that I might do the following to replace the original Q13, #2SC1384, and Q7, #2SD381 on each driver board. "I'd replace the 2SC1384 with a Zetex ZTX1056A, and the 2SD381 with an On-Semi MJE15032." However it seems those are no longer available either. After some digging it looks like KSC2690AYS and MJE15032G are suggested replacements. Can anyone please confirm that those are the correct current replacement parts before I place an order? The 2690 appears to be on backorder, but as you might imagine I am not in a huge rush to do this. There also seems to be some interesting current discussions here on replacing relays; is that a concern for the SPEC-4 as well?