[Coco] NitrOS-9 newbie needs some help
KnudsenMJ at aol.com
KnudsenMJ at aol.com
Tue Aug 10 22:22:00 EDT 2004
In a message dated 8/10/04 12:15:44 PM Eastern Daylight Time,
jdaggett at gate.net writes:
> Also high value carbon composition resisters tend to absorb
> moisture when setting and their values change. At work back
> several years ago we found this out with a 100K Ohm 1/8 W carbon
> comp resister. ISTR when parts off the shelf were measured they
> were more like 56K Ohm.
Sorry I forgot to mention that resistor values can drift, too.
In really old equipment, I've found that resistors usually go UP, not down,
in value, especially if they've been run hot (and there are plenty of
hot-running components in power supplies). I've seen them 2x to 4x their original
value.
Either way, it pays to check the resistor values and be ready to replace.
--Mike K.
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