Re: Over 40 and used one of these?
Hmm. I grew up making Sinclair kits and every one of them worked. The little radios (I had a Micromatic) worked fine and My stereo record player used two Z30's and a Stereo 60 pre-amp unit. All fine and lasted years. We even made an amplifier for our mobile disco using two Z50's and a PZ8. This may sound like a recipe for disgruntled dancers, but it only ever went off once - and it came back perfectly after a reset. I honestly think many of the complaints about Sinclair stuff come from people who built it badly.
Biting the hand that feeds IT
