[Boatanchors] Carbon Comp Resistors: The Darkness Gathers?

[WA5VGO]

They definitely will drift without current passing through them. I've 
got hundreds of NOS that are as much as 50% high. In my experience, 
Allen Bradley are the most stable. Even after a half century or more, I 
rarely find them out of spec.

It also seems that batches make a difference. I've worked on several 
radios that had all of the resistors of a particular value bad, but the 
rest were okay.

Darrell


On 7/6/2018 8:48 AM, Rob Atkinson wrote:
> I can't remember if I posted this or not but I don't think they drift
> with no current through them.  So for ham service which is
> intermittent, it will probably take a long time for a carbon resistor
> to drift.  The ones I find that have drifted are usually in gear
> that's 50+ years old.  Hate to throw shade on us but none of us will
> be around to see a drifted NOS carbon we install today.
>
> Rob
> K5UJ
>