12-05-2022, 06:15 PM
(This post was last modified: 12-05-2022, 06:17 PM by Mike Watterson.)
Yes, a simplified tester specially for audio power valves is a reasonable idea. You also don't need as many socket options, though perhaps an adapter per base with 2mm or 4mm wander plugs to the test system?
Maybe even two valves with grids, cathode & screens parallel and only the anodes separate with two meters or a meter with two movements on one scale or two parallel bargraphs?
I'm not sure as it's not something I've ever been very interested in.
Indeed any audio valve can oscillate at RF, even if only a few 100 kHz. Same even with power FETS even that have 2nF or higher gate capacitance.
Maybe even two valves with grids, cathode & screens parallel and only the anodes separate with two meters or a meter with two movements on one scale or two parallel bargraphs?
I'm not sure as it's not something I've ever been very interested in.
Indeed any audio valve can oscillate at RF, even if only a few 100 kHz. Same even with power FETS even that have 2nF or higher gate capacitance.
