Thanks Tom. I am thinking of the transistorized version with a 1k resistor in series with a push button to test to protect the circuit from a charged capacitor. Some caps even accumulate a small charge when at rest. Not that I would do anything silly like fry it with a charged capacitor.......I think that would be almost foolproof. As with all your videos, this one is really good. You and Don at Restore Old Radios have educated me more than you can know and I appreciate it.
e caps are supposed to have minimal leakage, check their data sheets. I built my own medium powered one using a Lionel train transformer adjustable 6-24vac in, into a voltage multiplier circuit, with output leads for volts/amp leakage monitoring. then a discharge load. Works great I get 130 vdc out.
That's a great high voltage capacitor leakage circuit Tom, I wonder if a DC Voltage Quadrupler Circuit would give you the 600 volts and you could have three voltage ranges.
Do you have a link to the original article for the low voltage/transistor-based tester? I built it from your drawing, and it works tickety-boo with any coupling capacitors, even showing leakage on 630VDC capacitors. But every single electrolytic I hook up shows up as a bright LED. Is this device not suitable for electrolytics? Thanks.
