8 Feb
2007
8 Feb
'07
2:46 p.m.
On 8 Feb 2007 at 20:32, Tony Duell wrote:
In general the storage capactiro is part of the CRT
(the anode coating on
the inside, an earthed coating on the outside, and the glass as the
dielectric between them). You shouldn't have any stored high voltages on
the unclipped anode connecotr.
True, high-voltage (low current) DC is usually far less dangerous
than AC, but there can arise nasty side effects from the involuntary
muscle twitch.
When I was much younger, I was working on a 3KV transmitter power
supply. I *thought* that the bleeder had sufficiently discharged
things, but it wasn't so. I brushed the top of an oil capacitor and
got nailed.
Unfortunately, about 6 inches in back of me was a concrete block
wall. The muscle contraction proceeded to slam my elbow with great
force into said wall. It hurt like hell for days. I'm fortunate I
didn't fracture something.
It's truly amazing how many lessons you can learn in the space of a
millisecond or so:
1) Never trust a bleeder--they can and do open.
2) Leave plenty of working space around you.
3) Try to work with one hand in a back pocket.
Cheers,
Chuck