22 Aug
2007
22 Aug
'07
8:02 p.m.
Mr Ian Primus wrote:
From working on video games, I too used to use this procedure.
However, at least with B&W vector video games, this procedure
can (and as I understand it usually will) blow the HV diode
which is present in many (all?) B&W HV systems.
The process is supposed to be done with a resistor so it bleeds
slowly. By memory I think I read somewhere a couple of megohm
resistors in series ... but I'd do some searching online on discharging
picture tubes.
I use an HV probe now that I picked up on eBay some time ago.
Not only can I use it to test HV, I can see the voltage as it bleeds to
know when it hits zero.
-- Curt
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b) How do you fit it.
#include <std_disclaimer.h>
Carefully. :) You want to be sure to discharge the
high voltage first (in both the terminal, and whatever
you're stealing a tube from!). To do this, attach a
length of wire to the metal shaft of a flat blade
screwdriver, and ground the wire to the chassis of the
terminal/whatever. Hold the insulated plastic handle
of the screwdriver and slide it under the rubber
suction cup of the picture tube, until you feel the
metal clip inside. Typically, this will be accompanied
by a *CRACK* as the high voltage discharges.
(Although, it is possible that the HV dissapated
earlier, depends on the terminal) Do this twice just
to be sure.