Groups > sci.electronics.design > #431268

Re: bipolar aluminum caps

Newsgroups	sci.electronics.design
Subject	Re: bipolar aluminum caps
References	<3i4vvb5pl7ac7o3h0uqhpotjp1bk257li0@4ax.com> <ntoffl$bh6$1@dont-email.me>
From	"David Eather" <eather@tpg.com.au>
Message-ID	<op.ypcyh1cywei6gd@phenom-pc> (permalink)
Date	2016-10-15 14:52 +1000

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On Fri, 14 Oct 2016 03:15:33 +1000, 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.

back to back electros in // with back to back diodes for improved  
reliability

Thread

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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