Resurrection of a Philips CD555 Sound Machine

@Virgil Gheorghiu Yes, the gear was available a few years back but once the original stock got sold out, the Dude stopped answering emails and requests. Anyway, for me its a good excuse to get back to Auto CAD.

@Longman that is a pretty neat tester, I use something similar: KKmoon Multi-functional Transistor Tester 128160
You just stick whatever you have in it and it tells you what it is. As I've learned today, if you test busted voltage regulator, it will tell you that it is a PNP transistor, the good one gets diagnosed as "No. unknow, or damaged"... but that's why we have Google