Paul: By any chance did you pick up that cap at HamCom last weekend? I
saw something like you describe there. I believe they were mylar
dielectric foil jobs. If so, they probably have resonance problems and I
would be skeptical about high current application in spite of the HV
rating. 73, Dan, N5AR
Paul and Abbi Elliott wrote:
>
> Bought a capacitor at a flea market that I am trying to identify in hopes
> that it would be satisfactory for a plate blocking cap in a legal limit
> amplifier. Put it in series with my 160m antenna lead to test it (on a
> dead band in the middle of the day), and it didn't even get warm from a
> couple of minutes key down); but since I can only muster about 3 amps in
> that set-up, I don't think the test is severe enough to tell me what I want
> to know.
>
> Some artist got turned loose on the name on it--has a "C" with some symbol
> surrounding it--that all I can figure out, by context, is supposed to be a
> "u" (doesn't look like one to me!) since the last letters are "stom".
> Right below the name are the following:
>
> CMR3A14OSP
> .000625 microfarad plus or minus 5%
> 20,000 WVDC
> 532036-1
> 8720
>
> Physical dimensions are: 1 1/2" W x 5/8" D x 4 1/4" L. Has 1" x1/2" metal
> strap connectors on each end. Body color is yellow, and the ends are red.
>
> Can someone, who either has the knowledge or catalog information, please
> tell me whether the current carrying capacity and dielectric properties are
> suitable for a plate blocking capacitor in a legal limit amplifier--about
> 4000 VDC at 700 ma--from 160m thru 10m?
>
> Thanks for any help.
>
> 73
>
> Paul W5DM
>
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