Neon based capacitor leakage tester

[Mike Watterson]

Can you use an HT bench supply instead of a scrap camera? I  know this means it's no longer a small portable unit but I have a 0-500V HT supply on my bench.

Sure you can use any sort of supply. Do be sure about the 2 x 1MΩ in series, without which it doesn't work and it's not safe. I'm not sure why you need to ask!

Though obviously larger capacitors are very dangerous once charged to 300V to 600V if they are passing the leakage test. An additional feature would be a two pole changeover power switch, where the second pole puts 10K or something across the capacitor.