[Boatanchors] Repair Advice

[Richard Knoppow]

----- Original Message ----- 
From: "David C. Hallam" <dhallam at knology.net>
To: <boatanchors at mailman.qth.net>
Sent: Tuesday, January 08, 2013 9:52 AM
Subject: Re: [Boatanchors] Repair Advice


> Paper "Micamold" capacitors were probably phased out 
> shortly after WW2.  "Micamold" used the old 6 dot AWS/JAN 
> color code for identification.  The first dot, i.e., upper 
> left, identified paper or mica; black dot for mica and 
> silver dot for paper.
>
> David
> KW3DH
>
     For postage stamp type capacitors marked with the JAN 
system paper caps have a silver dot in the upper left corner 
and in the center of the bottom row.  Mica caps with six 
dots have a black dot in the upper left.  There was also an 
RMA six dot system which does not seem to have 
differentiated the two types.
     I couldn't find Micamold in either of the two early 
1950s "Radio's Master" catalogue compilations I have.  They 
may just not have advertised there. Micamold made both paper 
and mica caps.
     My engineering mentor referred to them as "moldy mica" 
capacitors. He is the one who tipped me off about Black 
Beauty caps.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com