Path: csiph.com!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Andrew Roughan Newsgroups: comp.sys.apple2 Subject: Re: Magic smoke! Date: Fri, 6 Sep 2024 08:47:14 -0000 (UTC) Organization: A noiseless patient Spider Lines: 27 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Injection-Date: Fri, 06 Sep 2024 10:47:14 +0200 (CEST) Injection-Info: dont-email.me; posting-host="8c216ca65cc392a452ed564680ae8e18"; logging-data="814195"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19HcO4r/U0psQIyB+uQqMU4pr8r1p00OKw=" User-Agent: NewsTap/5.5 (iPhone/iPod Touch) Cancel-Lock: sha1:oIqB74IjoxYgpcBwrD+QAKiTMQE= sha1:2qdxGEkWzAodRF4otohNIuD7C0k= Xref: csiph.com comp.sys.apple2:49025 Michael J. Mahon wrote: > > BTW, “re-capping” is an artifact of 1) old vacuum tube (hot, high voltage) > equipment, 2) old and not very reliable paper-insulated or wet electrolytic > capacitors, and 3) folks not very skilled in the repair of such equipment. > The combination of these ingredients has led to an almost superstitious > tendency to “replace ‘em all”. This is almost never necessary, and often > results in needless damage. > > In the case of low-voltage, solid state electronic equipment, re-capping is > certainly unnecessary and potentially damaging. (Note that power supplies > are NOT low-voltage.) > While I don’t have your experience, I have heard from others who have extensive recapping experience, that over time, electrolytic capacitors in equipment that is not used can degrade. To prevent degradation, the recommendation is to use the equipment for 30mins a year to keep it exercised. If the equipment hasn’t been used for an extended period of time then exercising the equipment may not result in satisfactory function. Regards Andrew