[Boatanchors] Carbon Comp Resistors: The Darkness Gathers?

[Bry Carling]

I’ve seen very few of these older carbon comp resistors that haven’t drifted up in resistance, whether new and uninstalled - or whether already in use and in equipment. I’ve seen the same in radio receivers, transmitters and audio amplifiers.

Best regards - Brian Carling, AF4K





On Jul 6, 2018, at 9:48 AM, Rob Atkinson <ranchorobbo at gmail.com<mailto:ranchorobbo at gmail.com>> 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

On Thu, Jul 5, 2018 at 2:50 PM, rls19 <rls19 at psu.edu<mailto:rls19 at psu.edu>> wrote:
It’s good to remember that the change in value is a continuing process. 20% off today may continue on to be even further off in the not so distant future.

73,
Bob AD3K
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