[Hallicrafters] reading caps...

[Lloyd KK7IZ]

http://www.antiqueradioarchives.com/TM11-310/TM11-310.pdf
This has a very comprehensivesection on reading caps etc.
Thanx
Lloyd  KK7IZ
kk7iz at cox.net

Lloyd Godsey  KK7IZ
1315 N. udall Circle
Mesa, Az  85203
480-620-7145 (cell)
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Collecting OLD civilian aircraft radios and literature
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----- Original Message ----- 
From: "Mike Everette" <radiocompass at yahoo.com>
To: "Jim Tripp" <wa6dij at redshift.com>; <hallicrafters at mailman.qth.net>
Sent: Friday, December 30, 2005 6:40 PM
Subject: RE: [Hallicrafters] reading caps...


> There are several, I think at least three, different
> color code schemes for the flat molded capacitors
> which are either paper or mica types.  The best place
> to find information is in older ARRL handbooks from
> the 50s and early to mid 60s.  It can be very
> confusing unless you have access to each of the codes,
> because otherwise you may not be able to determine for
> sure exactly what you're dealing with.  
> 
> For example, if you read the code wrong, or use the
> wrong code to begin with (easy to do), you may not
> only misread the value of the cap, but mistake a mica
> for a molded paper.
> 
> At least one of these old handbooks should be a
> required text on the list of everyone who does radio
> restoration, and not just for all those great old ads.
> 
> These books are not expensive, typically from $5 to
> %10 at hamfests, and can often be found on that place
> we cannot mention. Look for anything from about 1950
> to 1965, because these will cover the JAN (Joint Army
> Navy) color code scheme which emerged from World War
> II.  Handbooks from prior to 1950 may not yet have
> been revised to include the JAN code, so check to see
> if it is there.  You need that information.
> 
> A lot of surplus caps found their way into
> commercial/consumer radio production after the war. 
> Manufacturers snapped them up because they were good
> quality and CHEAP.  They sometimes got intermixed with
> non-surplus, so you may find more than one color code
> used on the caps in any given piece of gear.  And
> there are two versions of the "civilian" EIA/RMA
> codes, which these handbooks also cover.
> 
> These books also show how to read the color-dot codes
> used on older disc ceramic caps.
> 
> 73
> 
> Mike
> WA4DLF
> 
> 
> 
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