04-01-2020, 09:05 PM
I've read a lot from his site and he obviously knows what he's talking about. As you say, he's not just published his designs but also the routes to them and justification. A real engineer in the best sense of the word.
What I'm concerned about is how valve characteristics might change when they're hammered pretty hard in service as compared to pulsed testing. When you have multiple rectifiers or series pass triodes in parallel (even with balancing resistors) you need to have confidence that the matching you did on a tester holds good when they're dissipating serious watts. The designers of those circuits knew their jobs and the kit was basically reliable but it was used in an era when replacement valves were both new and plentiful.
What I'm concerned about is how valve characteristics might change when they're hammered pretty hard in service as compared to pulsed testing. When you have multiple rectifiers or series pass triodes in parallel (even with balancing resistors) you need to have confidence that the matching you did on a tester holds good when they're dissipating serious watts. The designers of those circuits knew their jobs and the kit was basically reliable but it was used in an era when replacement valves were both new and plentiful.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
