[R-390] Brown Beauty voltage rating?

[roy.morgan at nist.gov]

Quoting Tim Shoppa <shoppa_r390a at trailing-edge.com>: 
> My naive guess would be that the last red on the 0.1uF's means
> 200V and that the last orange on the 0.033uF's mean 300V, but
> I'm sure that I'm wrong!


Tim,

I think you are right. but I am not sure.  
There are military cap marking tables on line.

See:
http://www.pmel.org/HandBook/HBpage26.htm

This site has a LOT of diffent radio-related standards:
http://www.wiktel.com/standards/
caps are at:
http://www.wiktel.com/standards/capa.htm
(but not the tubular cap ones.)

Go here for a variety of tips and useful info:
http://www.gbronline.com/radioguy/tips.htm
especially oriented to antique domestic radio restoration.

Buy a color code calculator (three bands only) for two bucks at:
http://www.physlink.com/estore/cart/ColorCodeCalculator.cfm?SID=37

This page decodes the MIL cap code such as: "CM 15 B D 332 K N 3"
(The R-388 manual may contain such a code for the caps.)
http://xtronics.com/kits/ccode.htm

A calculator for modern dipped tantalum caps is at:
http://www.csgnetwork.com/capcctantcalc.html
along with a long list of other calculators anc converters.

Lots of good info is at:
http://www.qsl.net/wa7zcz/area2/t_of_c.html
and on page 73 is EIA and MILITARY Color Codes For Resistors and Capacitors:
http://www.qsl.net/wa7zcz/area2/page73.html
This page mentions MILITARY STANDARD MIL-R-11E and if you find that one you mey
have the right info from the source.

Roy


Roy Morgan
7130 Panorama Dr.
Derwood MD 20855