"Watson A.Name - \"Watt Sun, the Dark Remover\"" wrote:
Quote:
I have fifty 910 ohm 1/4W carbon composition resistors, still in the
paper tape, which is labeled:
OHMITE
910 OHM
1/4 W 5%
RC07GF911J
OC9115
Judging from the last line, they're 14 years old. They've never been
used, AKA New Old Stock. Every resistor measures greater than 5%, some
are over 1k. Over 14 years, would drift from aging cause them to go
that far out of tolerance? I have carbon film resistore much older than
these and they still measure within 5% tolerance, usually within 2%.
Thanks.
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Do you know their history? Maybe they were out of tolerence at time of
manufacture.
I always heard that carbons change value with humidity. I have many unused
Allen Bradley 5% 1/2W carbons which I took from new stock in the early 70's, and
checking a few of the BROWN-third-band ones at random show all within tolerence.