Re: Yes, yet another home made valve tester.
Nah, nah, Adrian, keep at it. Don't let PO issues put you off. Another thing you could try is to keep Grid Voltage supply wiring well away from Anode & Screen wiring where possible. To this end you might consider colour coding your circuitry wiring inside the tester. There was an old code sometimes used years ago :-
Heater = Brown,Cathode = Yellow,Grid = Green,Screen = Red,Anode = Blue, & Earth = Black.
As Pete says, AVO's design does much to prevent PO. Apart from effing CT160's, which because of the cramped wiring inside the clamshell case, are prone to bursting into PO with high power &/or high slope valves.
Top Cap's idea is a jolly good hint. Also,B7G & B9A & one or two other types of valve holders often have B/C skirts to fit spring-loaded screening cans.
Regards, David
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