All,

AFAIK, Gold and Silver bands were used to indicate both a multiplier value
Gold being .01
and Silver being .1.  As a tolerence band, Gold is 5% and Silver is 10%.
And also AFAIK,
this has been the case at least since the fifties, and I believe that is
goes back to at least the
late 30's, early 40's.  I say this because ever since I was a young boy in
the late 50's, I can
remember seing this on a color code chart as well as in practice in such
things as VTVM's,
Signal Generators, etc.   Also, when I was in the Navy, we used color codes
using both as
Tolerence indicators as well as Multipliers.  So, what this boils down to is
that I believe this to
have been in practice since at least the 50's, and most likely since the
late 30's or early 40's.
It may go back even further than this possibly, but I cannot verify this
from first hand experience.
Does this help any, or confuse you even more?


Regards,


Jim





-----Original Message-----4
From: Mark Willis <mwillis@NWLINK.COM>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Sunday, July 04, 1999 2:15 PM
Subject: Re: [OT] UK Schematic Markings


>Nigel Goodwin wrote:
>> <snipped>
>> 0.1 ohms. Talking of low value resistors, does anyone know when silver
>> and gold were added as multipliers as well as tolerance bands?. They
>> only seem to have started being used in the last few years, and were
>> never mentioned when I was at college or in any colour code tables I
>> ever saw?.
>> --
>>
>> Nigel.
>
>  I could swear I remember them back as early as the late 70's or early
>80's, but I cannot document that.
>
>  Mark