Quote:
Originally Posted by zeno
If the mystery part is the white thing its a focus stick.
Seen the focus tube, socket & filament winding eliminated a
few times. Sockets were common to burn up.
If you take apart a focus or HV stick its made up with
a stack of disc shaped diodes, many of them..........
73 Zeno 
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That is why they don't test on a new meter with diode test.
Several rectifier wafers in series with a spring at one end.....
.7v + .7v + .7v + .7v ........ 10 of 'em ??
They don't test well analog either.....
They do have a + on one end usually...
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