Re: Electrolytic caps?
From: Spehro Pefhany (speffSNIP_at_interlogDOTyou.knowwhat)
Date: 02/26/05
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Date: Sat, 26 Feb 2005 18:02:33 -0500
On Sat, 26 Feb 2005 15:04:30 -0700, the renowned Jim Thompson
<thegreatone@example.com> wrote:
>On Sat, 26 Feb 2005 21:51:38 GMT, Joerg
><notthisjoergsch@removethispacbell.net> wrote:
>
>>Hello Watson,
>>
>>>Yes and yes, but it depends on how old those caps are. Over five years
>>>old, and they're not 'fresh'; ten years and they're 'stale'.
>>>
>>>
>>
>>Nah. I have some 40+ year old radios where the electrolytic caps are
>>just fine. A couple times I actually did a resistor charge and leakage
>>test just to see. They were nearly as good as new.
>>
>>But sometimes when they had been in storage for decades they may have to
>>be "formatted" slowly to get them used to the job of "being a capacitor"
>>again.
>>
>>Regards, Joerg
>>
>>http://www.analogconsultants.com
>
>Hi, Joerg. I do, literally, have some 40 year-old aluminum
>electrolytics in my part bins.
>
>What's the best way to "format" them?
>
> ...Jim Thompson
It's actually "reform". Here's a web site that describes the process:
http://www.vcomp.co.uk/tech_tips/reform_caps/reform_caps.htm
Best regards,
Spehro Pefhany
-- "it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
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