CRT Tester as homebrew project

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CRT Tester as homebrew project

Post by harold wright on Wed Dec 05, 2012 10:59 pm

I somehow accumulated some CRT testers over last 25 years and can not seem to sell them. So, I decided to see if I could build something else useful from one. In addition to having selectable heater voltages from 1 to 13 v, it has a volt. doubler /filter ckt. that provides about +300v. So it could light up any number of tubes (one or two at a time) and has B+ for experimenting with said tubes. I suppose someone has already done this but I have not seen any articles about it.

Harold

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Re: CRT Tester as homebrew project

Post by Bill Cahill on Thu Dec 06, 2012 7:01 am

Not sure the power transformer could handle either the current, or, the run time. These testers were meant for short use. Not extended. I fear the power transformer would quickly overheat.
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