[sdiy] Weird tubular, grey (sometimes blue) resistors

[harrybissell at wowway.com]

Usually they are wirewound resistors, they are wound on a
hollow ceramic core (tube) and coated with some vitreous
enamel (like a fired ceramic glaze).

Look for "Ohmite Brown Devils" on google and you'll
find some examples ?

But ~caps~ like these ??? with a hole in the center ???

H^) harry




On Mon, 12 Nov 2007 21:41:48 -0500, anthony wrote
> In several thinsg I've taken apart over the years I have found these 
> funky resistors that are tubular - like a hollow tube. They are 
> usually grey and sometimes blue. The blue ones are often 1% and the 
> grey ones often come out of cheap or old things and seem crappier. 
> But I'm wondering what it is these resistors are made of? Is it 
> another way to make carbon film resistors? I've seen capacitors like 
> this too. It's usually easy to tell the difference since the 
> resistors tend to have their values written out rather than color-
> coded. I wonder if there is any vintage mojo in these?
> 
> cheers,
> aa
> 
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Harry Bissell & Nora Abdullah 4eva