What are these ?
My turn to ask a question of the brains trust.
I have a mob of these "bits1".
I have never seen them before.
They seem to be a piece of carbon rod held in two endcaps, that are glued on:
SOME are not so well done. see pic "quality built".
A few of them have a single white dot, as per the pic "white_dot".
I have suspected they are inrush limiters from the 50's, because If I heat them while measuring resistance, the resistance drops quickly and markedly, when I direct my heatshrink torch ( LPG gas tiny torch) onto them.
There are two sizes shown, but there is very little difference between them, apart from resistance, those unmarked show "about" 250 ohms ( 220-270)
Those with white dots show 350 ohms.
Sizes are 6.7mm dia with white dot.
Without dot they are 5.75 to 5.8 mm dia.
Any clues ?
with thanks in advance
Joe
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