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

[neil.johnson97 at ntlworld.com]

>From harrybissell at wowway.com
> But ~caps~ like these ??? with a hole in the center ???

Google found this:

http://www.vintage-radio.com/repair-restore-information/valve_capacitors.html

An interesting photo gallery of older caps.

Neil

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