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Old 30th March 2003, 05:40 PM   #1
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Default dayton polypropylene cap, polarity?

i have a few of these caps

http://www.partsexpress.com/pe/pshow...number=027-428

however they have no markings for + and -, are they electrolytic?? if they are how can i determine the polarity?
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Old 30th March 2003, 05:43 PM   #2
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i found this page which explains alot about dif types of caps, and it states polypropylene have no polarity---is this always true??

http://www.interq.or.jp/japan/se-inoue/e_capa.htm
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Old 30th March 2003, 08:15 PM   #3
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ttt
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Old 30th March 2003, 08:28 PM   #4
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No, they don't have polarity, hook them up either way and it'll work.
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Old 30th March 2003, 08:57 PM   #5
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But hook them up the same way in both channels !!!!

You will have different sounding channels if you don't. They don't have polarity but the outer foil ( when marked ) is connected preferably to the lowest impedance point ( mostly the ground side ). That way they are not so susceptible to radiated noise.
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Old 31st March 2003, 03:16 AM   #6
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ok thanks alot. i hooked them both up the same way before reading the replies and i tested them on a test speaker and generated tones with my computer sound card---plotted it logarithmically and it worked out perfectly! ... i used copper foil air core inductors and dayton polypropylene caps from parts express and so far so good

thanks

-chris
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