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What are these?

poor mystic

Apr 8, 2011
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Hi t0ast
They look like carbon resistors to me. Have you tried measuring resistance?
Carbon resistors were always used in the old valve radios I played with as a child.
Carbon resistors have a lower self-inductance than the modern metal-film replacements.
You can still buy carbon resistors.
 

t0ast

May 13, 2011
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May 13, 2011
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I don't know why I didn't even think to measure resistance. I just did and got around 101 ohms. I had never seen resistors like these. These are in a doorbell that was made in 1988. I will look for some carbon resistors. Thank you for your reply and assistance. :) About 100 ohms doesn't seem right for the bands on them though...
 
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davenn

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Sep 5, 2009
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brown black brown are the bands for 100 Ohms :)

the silver is the tolerance 10%

Dave
 

t0ast

May 13, 2011
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Ah ok, I suppose those could be brown. They just looked more orange to me. lol Thank you also. I will find myself a 100 ohm carbon resistor. :)
 

duke37

Jan 9, 2011
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Why do you want another if the value is right?
 

shrtrnd

Jan 15, 2010
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When exposed to excessive heat, the paint on the bands can burn, and appear to
change color.
They look like old style resistors, and the value of 100 ohms makes sense (brown, black, brown, silver + 10% tolerance).
I want to say however, that in the 1960's thru 80's, I've found some manufacturers using
that type of encapsulation for their capacitors and inductors, ... so sometimes you
have to be careful of parts from that time period.
 
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