UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

GMB · 3rd Feb 2023, 6:59 pm

Testing for leakage in-circuit is hard unless you are lucky with the circuit.

Out of circuit the rule is to measure the leakage current with about the working voltage applied (with resistor in series to protect the meter in case of shorts).
For HT caps an insulation tester can be very useful for doing this.
For very low voltage caps you can use an ordinary resistance meter (checking which way it applies its voltage).

The forum search feature is rather useless because adding more words widens the search rather than narrows it. So far I haven't found a syntax that improves that. But you can use a regular search engine to search the site by adding "site:www.vintage-radio.net" in the search so it only looks on this site.

3rd Feb 2023, 6:59 pm	#4
GMB Dekatron Join Date: Aug 2003 Location: near Reading (and sometimes Torquay) Posts: 3,094	Re: Testing for leaky caps Testing for leakage in-circuit is hard unless you are lucky with the circuit. Out of circuit the rule is to measure the leakage current with about the working voltage applied (with resistor in series to protect the meter in case of shorts). For HT caps an insulation tester can be very useful for doing this. For very low voltage caps you can use an ordinary resistance meter (checking which way it applies its voltage). The forum search feature is rather useless because adding more words widens the search rather than narrows it. So far I haven't found a syntax that improves that. But you can use a regular search engine to search the site by adding "site:www.vintage-radio.net" in the search so it only looks on this site.