[AMRadio] Power factor

russ dworakowski wb3fau at hotmail.com
Thu Apr 4 11:00:21 EST 2002

Don,  this  won't  fully answer your  question about  power factor
of  electrolytic capacitors,  but  it  will lead you in  the  right  
direction.  My  Heath IT-28  cap  tester  has a power   factor adjustment,  
it  is a  percentage,  a  low  percentage means a very good
cap.  Anything  over about 15%  means a limited  lifetime.  Russ

>From: "Donald Chester" <k4kyv at hotmail.com>
>Reply-To: amradio at mailman.qth.net
>To: billsmith at ispwest.com
>CC: amradio at mailman.qth.net
>Subject: [AMRadio] Power factor
>Date: Thu, 04 Apr 2002 08:24:15
>>From: "Bill Smith" <billsmith at ispwest.com>
>>If the cap shows high leakage, or a high power factor, it is probably
>> >spent, but if it acts as a new capacitor you have saved a good part.
>What exactly do you mean by a capacitor's power factor?  How do you measure
>it and exactly what are you measuring?  I am familiar with the concept when
>talking about transformers, but what about capacitors?  I would assume the
>power factor of a good capacitor standing alone would be zero, since the
>(ac) current would lead the voltage by 90 degrees.
>Don K4KYV
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