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Groups > sci.electronics.design > #431269
| Newsgroups | sci.electronics.design |
|---|---|
| Subject | Re: bipolar aluminum caps |
| References | <3i4vvb5pl7ac7o3h0uqhpotjp1bk257li0@4ax.com> <ntoffl$bh6$1@dont-email.me> <83lvvblrc9ldnuvmho45tkflhbljgq6uss@4ax.com> <d817e568-004c-006f-404c-9569f3502063@electrooptical.net> |
| From | "David Eather" <eather@tpg.com.au> |
| Message-ID | <op.ypcyi8jtwei6gd@phenom-pc> (permalink) |
| Date | 2016-10-15 14:53 +1000 |
On Fri, 14 Oct 2016 04:52:40 +1000, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote: > On 10/13/2016 02:42 PM, John Larkin wrote: >> On Thu, 13 Oct 2016 17:15:33 -0000 (UTC), Frank Miles >> <fpm@u.washington.edu> wrote: >> >>> On Thu, 13 Oct 2016 07:01:54 -0700, John Larkin wrote: >>> >>>> High-K ceramic caps are awful. They lose 90% of their capacitance at >>>> rated voltage. >>>> >>>> Are bipolar aluminum caps reliable? >>>> >>>> I would think that polymer aluminum caps would make good nonpolarized >>>> things, but there don't seem to be any. >>> >>> My dim recollection is that a bipolar electrolytic is equivalent to >>> back-to-back polarized electrolytics. That is, you get twice the ESR & >>> ESL, and some weirdness around 0-volts. I'd be nervous if the current >>> was appreciable. However they've been used for many years in lots of >>> applications, mostly in moderate-level coupling applications where >>> distortion wasn't an issue. Probably as reliable as a standard >>> electrolytic. >> >> I guess I could do something like this... >> >> >> ---------+ << needs to go +15 to -6 >> | >> | >> | >> ___ + >> ___ 47u 25V >> >> | >> +-----R---- -6V >> | >> ___ >> ___ 220u 6V >> | + >> | >> | >> | >> | >> | >> gnd >> >> > > I'd still add a diode across each cap. That -20/+80% spec range could > make a bit of a mess otherwise. > > Cheers > > Phil Hobbs > and there Phil has it 24hrs earlier
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bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-13 07:01 -0700
Re: bipolar aluminum caps George Herold <gherold@teachspin.com> - 2016-10-13 07:11 -0700
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-15 00:38 -0800
Re: bipolar aluminum caps tabbypurr@gmail.com - 2016-10-13 07:34 -0700
Re: bipolar aluminum caps Reinhardt Behm <rbehm@hushmail.com> - 2016-10-13 22:58 +0800
Re: bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-13 08:44 -0700
Re: bipolar aluminum caps tabbypurr@gmail.com - 2016-10-13 08:59 -0700
Re: bipolar aluminum caps George Herold <gherold@teachspin.com> - 2016-10-13 09:14 -0700
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 03:40 -0500
Re: bipolar aluminum caps Syd Rumpo <usenet@nononono.co.uk> - 2016-10-14 09:52 +0100
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 03:59 -0500
Re: bipolar aluminum caps Syd Rumpo <usenet@nononono.co.uk> - 2016-10-14 11:01 +0100
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 21:48 -0500
Re: bipolar aluminum caps tabbypurr@gmail.com - 2016-10-14 02:18 -0700
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-15 00:45 -0800
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-15 11:06 -0400
Re: bipolar aluminum caps tabbypurr@gmail.com - 2016-10-15 08:23 -0700
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-15 19:39 -0400
Re: bipolar aluminum caps Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2016-10-18 21:23 -0400
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-15 00:42 -0800
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-15 11:07 -0400
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-17 09:28 -0800
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-17 19:52 -0400
Re: bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-17 17:29 -0700
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-19 13:06 -0800
Re: bipolar aluminum caps Joerg <news@analogconsultants.com> - 2016-10-13 09:14 -0700
Re: bipolar aluminum caps Frank Miles <fpm@u.washington.edu> - 2016-10-13 17:15 +0000
Re: bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-13 11:42 -0700
Re: bipolar aluminum caps Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2016-10-13 14:52 -0400
Re: bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-13 11:56 -0700
Re: bipolar aluminum caps "David Eather" <eather@tpg.com.au> - 2016-10-15 14:53 +1000
Re: bipolar aluminum caps "David Eather" <eather@tpg.com.au> - 2016-10-15 14:52 +1000
Re: bipolar aluminum caps Tim Wescott <tim@seemywebsite.really> - 2016-10-13 19:41 -0500
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 03:43 -0500
Re: bipolar aluminum caps Tim Wescott <seemywebsite@myfooter.really> - 2016-10-14 12:19 -0500
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 22:18 -0500
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-13 20:57 -0400
Re: bipolar aluminum caps John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-13 18:05 -0700
Re: bipolar aluminum caps krw <krw@nowhere.com> - 2016-10-13 21:39 -0400
Re: bipolar aluminum caps "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-10-14 03:44 -0500
Re: bipolar aluminum caps whit3rd <whit3rd@gmail.com> - 2016-10-14 12:22 -0700
Re: bipolar aluminum caps whit3rd <whit3rd@gmail.com> - 2016-10-13 18:01 -0700
Re: bipolar aluminum caps alpibucky <alpibucky@mail.be> - 2016-10-14 22:23 +0200
Re: bipolar aluminum caps Robert Baer <robertbaer@localnet.com> - 2016-10-15 00:35 -0800
Re: bipolar aluminum caps Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2016-10-18 21:22 -0400
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