[R-390] Some questions?

[Roy Morgan]

At 10:32 AM 8/26/2005, N4TUA at aol.com wrote:
>Hello Friends,
>I have been changing the brown beauties out in the R-390A. ... applying 
>variable DC to one side of the capacitor and with the DC milliamp meter 
>checking the current through the capacitor. Is this a good indication of 
>the leakiness?

Yes, indeed. It's a fine indication.  A more sensitive method is to use a 
DMM instead of your milliamp meter, set to voltage. It likely has a 10 
meg-ohm input resistance so a ten volt indication is one microampere.

If your caps are leaking milliamps at rated voltage or less, they are  VERY 
leaky.

>I use cheap solder wick and have some solder flux called NOKORODE.

What that stuff does not corrode (not too much anyway) is copper pipes. Use 
it in plumbing not electronics.  There is paste flux meant for electronics.

Roy



- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
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