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Old 6th Jan 2020, 7:34 am   #1561
Diabolical Artificer
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Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 7,639
Default Re: The "Sussex" Homebrew Valve Tester.

I built my own valve tester, not the Sussex and used a LM317 variable 0-30v PSU using two TIP3055's as series pass trannies, this gets 0-30 @ 3A. I did rig it so it did fixed values too, IE 5, 6.3, 12.6v etc but found several valves tested exceeded their heater max voltage. The only problem though might be testing some directly heated filament type valves especially rectifiers, something to bear in mind.

Andy.
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