[Boatanchors] Repair Advice

[Bob Macklin]

I just replace all the old mica capacitors with dipped mica (DM-15, DM-10, 
etc).

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
----- Original Message ----- 
From: "Richard Knoppow" <1oldlens1 at ix.netcom.com>
To: <dhallam at knology.net>; <boatanchors at mailman.qth.net>
Sent: Tuesday, January 08, 2013 10:21 AM
Subject: Re: [Boatanchors] Repair Advice


>
> ----- 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
>
>
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