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'Historic resistor color codes'
1999\07\04@153832 by Scott Newell

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My 1950 ARRL Handbook has the current resistor color codes, including the
use of gold and silver as 0.1 and 0.01 multipliers.

My older literature, a '42 ARRL Handbook and Terman's 'Radio Engineer's
Handbook' (excellent book, BTW), describes the old style resistor marking
style where the body color is the first digit, the color at the end of the
body is the second digit, and the color band in the center is the
multiplier.  No mention of gold, silver, or tolerances.

So, sometime between '42 and '50 the industry changed the resistor marking
style.  Can anyone else narrow it down?


newell

1999\07\04@183719 by paulb

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Scott Newell wrote:

> My older literature, ... describes the old style resistor marking
> style where the body color is the first digit, the color at the end of
> the body is the second digit, and the color band in the center is the
> multiplier.

 Actually, it was usually a *spot* in the centre.  I used to love the
pretty colours, especially the red body and yellow spot.  Can't remember
the end colour to go with that, but think it may have been brown.

 The silver tolerance band, if present, went on the *other* end.
Obviously they were the *precision* resistors.
--
 Cheers,
       Paul B.

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