UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Peter.N. · 22nd Sep 2022, 10:51 am

I had a couple of friends at school in the '50s who like me went into the TV trade and we used to build our own amps and compete on who could make the best bass boost circuit. We both had a chassis, mains transformer, output transformer and a few octal valve holders.

The chassis had many unused holes due to the number of times we had rebuilt them. Initially we had a couple of 6V6's and probably and ECC33, I have forgotten now, then we graduated to 6L6's or even KT66s and I reckoned all our amps sounded excellent feeding a 10" speaker in a sand filled baffle, mono of course, stereo hadn't started yet.

We had loads of fun with those (the neighbors probably didn't) and I can draw you a circuit of those basic amps even now from memory.

Peter

22nd Sep 2022, 10:51 am	#41
Peter.N. Dekatron Join Date: Jul 2008 Location: Charmouth, Dorset, UK. Posts: 3,601	Re: What makes a good valve amplifier? I had a couple of friends at school in the '50s who like me went into the TV trade and we used to build our own amps and compete on who could make the best bass boost circuit. We both had a chassis, mains transformer, output transformer and a few octal valve holders. The chassis had many unused holes due to the number of times we had rebuilt them. Initially we had a couple of 6V6's and probably and ECC33, I have forgotten now, then we graduated to 6L6's or even KT66s and I reckoned all our amps sounded excellent feeding a 10" speaker in a sand filled baffle, mono of course, stereo hadn't started yet. We had loads of fun with those (the neighbors probably didn't) and I can draw you a circuit of those basic amps even now from memory. Peter