GB> How to read postage-stamp micas (not the color dots)

[Mike Silva]

Thanks for the link (need to type xtronics.com, not /com).  Most of the caps
I have don't quite match the military CM model described -- specifically
they don't seem to list a letter for voltage rating.  I'll assume this means
a default of 500V unless somebody tells me otherwise.

73,
Mike, KK6GM

----- Original Message -----
From: "Robert P. Okas" <vintage at best.com>
To: "Mike Silva" <mjsilva at jps.net>
Cc: <glowbugs at piobaire.mines.uidaho.edu>; <BOATANCHORS at LISTSERV.TEMPE.GOV>
Sent: Monday, February 26, 2001 6:48 PM
Subject: Re: GB> How to read postage-stamp micas (not the color dots)


> Since others might be interested, I'm replying to the list.
> Check out:
>
> http://xtronics/com/Kits/ccode.htm
>
> for a quick tutorial on how to read capacitor codes.
>
> Mikes caps are military grade. Here's the decoding:
>
> o CM = Molded Case
>
> o 30, 35 = Case size code, don't have any more info
>
> o F = voltage rating = 1000V
>
> o XXY = Cap value (XX) and multiplier (Y) in pF
>
> o Tolerance:
> J = 5% tolerance
> G = 2% tolerance
>
> o Temperature range:
> N = -55 to +85 degrees C
> P = -55 to +150 C
>
> o 3 = shock and vibration grade: 20G at 10Hz - 2KHz for 12 hours
>
>
> 73,
> Bob - W3CD
>
> On Mon, 26 Feb 2001, Mike Silva wrote:
>
> > Hi all,
> >
> > I've got some postage-stamp micas that have their values indicated via
text
> > rather than color dots, and I don't know the code (except I can figure
out
> > the mmf's).  Some examples:
> >
> > CM35E 103 JN3 (0.01 uf)
> > CM30F 242 JP3 (2400 mmf)
> > CM35F 103 GP3 (0.01 uf)
> >
> > It's the CM stuff and the JN/JP/GP stuff I don't know.  Checked some
ARRL
> > handbooks from 1950 to 1980 and didn't see anything.  Mostly I care
about
> > the voltage ratings.  Thanks!
> >
> > 73,
> > Mike, KK6GM
> >
> >
> >
>
>