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Old 29th July 2001, 03:42 PM   #11
AuroraB is online now AuroraB  Norway
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Location: Norway, -north of the moral circle..
Lightbulb Replacing non-polarized...

A traditional method of avoiding expencive nonpolarized caps in small signal circuits have been to use two electrolytics and connecting them together + to + , possibly also with a high value resistor ( 1oK ++ ) to the appropriate supply to keep the polarization... There is no logical reason for not connecting the negative poles and biasing to ground in a SE circuit....I have not been working on SE power amps since my very young days, and have not tested this on a modern SE power amp...might be worth trying, as one of the main arguments against ellytics in signal paths have been the lack of proper polarization....the idea is free for testing, I have no operational circuit readily available to test it myself...????
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Old 30th July 2001, 11:08 AM   #12
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From the price they must be metallised polypropylene, but for what it is worth try http://www.maplin.co.uk/mainframe.asp

Product code search for TX84F.

Cheers, Jake

[whoops, didn't see before posting that the 4500uf mentioned was the total value of two coupling caps, nothing there for 2200uf. Only a 4700uf cap at the url. In fact I'm wondering if they aren't really electrolytics in the wrong section of the catalogue]

[Edited by Jakeh on 07-30-2001 at 12:44 PM]
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