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Groups > sci.physics > #530242
| From | gilber34 <fafa@invalid.com> |
|---|---|
| Newsgroups | sci.physics |
| Subject | Re: Capacitor Question |
| Date | 2015-11-03 16:35 -0600 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <n1bcsj$fla$1@speranza.aioe.org> (permalink) |
| References | <pan.2015.11.03.22.14.56@localhost.localdomain> |
On 11/3/2015 4:14 PM, Fabian Russell wrote: > Electrolytic Capacitor Question > -------------------------------- > > A) Prologue of logic: > > This question either is physics or is not physics. > > This question is not physics. > > Therefore it is. > > B) Question > > I have several home-brew circuits which were built several > years ago. These circuits contain a few large capacity and other > electrolytic capacitors. > > What is the lifetime of an electrolytic cap before it needs > replacing? 10 to 40 years, depends upon construction and if it had power on it most of the time. Also a lot of bad electrolytics were build about 10 to 15 years ago, and there is a lot of computer stuff out there now, that have expanding electrolitics in them now, failing. (like viewsonic monitors) if paper, get rid of them. > > Because the very large caps are involved in power supply ripple > filtering, I have placed these into a capacitor short circuit > that I can can switch on after power off. Does having these > caps on s short circuit improve lifespan? > no, you can replace that switch with a resistor across the cap, which will drain power off cap. something like a 1/4 watt, 20k ohm, depends upon voltage and a few other things.
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Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-03 22:14 +0000
Re: Capacitor Question gilber34 <fafa@invalid.com> - 2015-11-03 16:35 -0600
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-03 22:59 +0000
Re: Capacitor Question gilber34 <fafa@invalid.com> - 2015-11-03 18:10 -0600
Re: Capacitor Question jimp@specsol.spam.sux.com - 2015-11-03 22:47 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-03 23:07 +0000
Re: Capacitor Question jimp@specsol.spam.sux.com - 2015-11-03 23:20 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-03 23:42 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-04 02:49 +0000
Re: Capacitor Question gilber34 <fafa@invalid.com> - 2015-11-03 21:40 -0600
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-04 04:01 +0000
Re: Capacitor Question jimp@specsol.spam.sux.com - 2015-11-04 06:03 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-04 07:07 +0000
Re: Capacitor Question jimp@specsol.spam.sux.com - 2015-11-04 20:29 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-04 20:51 +0000
Re: Capacitor Question jimp@specsol.spam.sux.com - 2015-11-04 21:08 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-04 21:53 +0000
Re: Capacitor Question jimp@specsol.spam.sux.com - 2015-11-04 22:20 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-04 22:42 +0000
Re: Capacitor Question jimp@specsol.spam.sux.com - 2015-11-04 23:07 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-05 00:28 +0000
Re: Capacitor Question jimp@specsol.spam.sux.com - 2015-11-05 00:46 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-05 00:39 +0000
Re: Capacitor Question jimp@specsol.spam.sux.com - 2015-11-05 00:58 +0000
Re: Capacitor Question benj <none@gmail.com> - 2015-11-04 18:25 -0500
Re: Capacitor Question benj <none@gmail.com> - 2015-11-04 18:37 -0500
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-05 00:09 +0000
Re: Capacitor Question benj <nobody@gmail.com> - 2015-11-04 21:35 -0500
Re: Capacitor Question gilber34 <fafa@invalid.com> - 2015-11-04 21:51 -0600
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-05 04:19 +0000
Re: Capacitor Question gilber34 <fafa@invalid.com> - 2015-11-05 11:10 -0600
Re: Capacitor Question "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-11-05 09:15 -0800
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-05 18:08 +0000
Re: Capacitor Question jimp@specsol.spam.sux.com - 2015-11-05 19:26 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-05 19:44 +0000
Re: Capacitor Question jimp@specsol.spam.sux.com - 2015-11-05 19:56 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-05 20:53 +0000
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-05 21:52 +0000
Re: Capacitor Question benj <none@gmail.com> - 2015-11-04 18:41 -0500
Re: Capacitor Question gilber34 <fafa@invalid.com> - 2015-11-04 21:54 -0600
Re: Capacitor Question benj <nobody@gmail.com> - 2015-11-04 02:17 -0500
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-04 07:30 +0000
Re: Capacitor Question gilber34 <fafa@invalid.com> - 2015-11-04 07:48 -0600
Re: Capacitor Question benj <nobody@gmail.com> - 2015-11-04 14:04 -0500
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-04 19:28 +0000
Re: Capacitor Question benj <none@gmail.com> - 2015-11-04 18:49 -0500
Re: Capacitor Question gilber34 <fafa@invalid.com> - 2015-11-04 20:41 -0600
Re: Capacitor Question Fabian Russell <root@localhost.localdomain> - 2015-11-05 03:16 +0000
Re: Capacitor Question gilber34 <fafa@invalid.com> - 2015-11-04 21:58 -0600
Re: Capacitor Question "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-11-04 12:14 -0800
Re: Capacitor Question benj <none@gmail.com> - 2015-11-04 18:44 -0500
Re: Capacitor Question gilber34 <fafa@invalid.com> - 2015-11-04 20:41 -0600
Re: Capacitor Question gyansorova@gmail.com - 2015-11-05 16:34 -0800
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