[Boatanchors] leaky cap data point

Bill Cromwell wrcromwell at gmail.com
Tue Sep 22 21:18:53 EDT 2015


Hi

I had a little time to go into an old AM-FM-SW receiver from the 1940s 
to examine the caps with my "new" Heathkit C-2. I haven't played with 
the C-2 very much and I wondered if *all* of those old caps could be 
*that* bad. So I got out some caps I have recently bought(in this 
century) and the C-2 likes every one of them. I'll inventory what is 
needed in the radio (all of the paper and electrolytic caps) but I'm 
guessing I will be replacing around a dozen or so caps. The 
electrolytics in the pwr supply filter are dead short! I probably have 
all I need right here. The power supply caps are only 40-20-20 at 200 
volts and I think I have some good ones near that value harvested from 
curly CFL bulbs. I hate those high power RFI generators but they do have 
a few nice parts inside:) I don' wait for them to fail before the 
harvest <evil grin>.

After running the leakage tests on the new caps I was really surprised 
at the fat, loud sparks I drew when I discharged them! I suppose they 
are in good condition. I have more confidence in the C-2 now an old 
radio will soon be coming back to life.

73,

Bill  KU8H


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