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Cc: drakelist@zerobeat.net
Subject: Re: [Drakelist] Testing Caps for Leakage
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Richard,
Any readily detectable leakage is too much for a grid coupling cap IMO. A
cap that even partially closes the eye on the 1uA setting o
ard Knoppow <1oldle...@ix.netcom.com>
> Cc: Drake List
> Subject: Re: [Drakelist] Testing Caps for Leakage
>
> Richard,
>
> That is very true. Paper caps can leak yet look OK for capacitance and not
> too bad for ESR. I think 5uA is too high for a paper cap. If t
Richard,
Interesting..and I especially understood the last sentence..
Thanks,
Lee
-Original Message-
From: Richard Knoppow <1oldle...@ix.netcom.com>
To: 'Drake List'
Sent: Sun, Apr 3, 2011 1:08 am
Subject: [Drakelist] Testing Caps for Leakage
For years
-Original Message-
From: Dennis Monticelli
Sent: Apr 3, 2011 1:22 AM
To: Richard Knoppow <1oldle...@ix.netcom.com>
Cc: Drake List
Subject: Re: [Drakelist] Testing Caps for Leakage
Richard,
That is very true. Paper caps can leak yet look OK for capacitance and not too bad for E
Richard,
That is very true. Paper caps can leak yet look OK for capacitance and not
too bad for ESR. I think 5uA is too high for a paper cap. If that cap is
being used for plate to grid coupling and the grid circuit is 1 Mohm, there
will obviously be a problem.
I have a common Heathkit IT-11 c
For years I thought it was sufficient to test caps for
dissipation factor, another name for ESR, I discovered the
hard way its not. Many will tell you that electrolytic caps
must be tested with polarizing voltage and that may make a
difference in the measured capacitance of some but that is
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