8 Feb
2007
8 Feb
'07
1:25 p.m.
> give you a zap if it held a charge. I recommend
taking a small screw
> driver and attach a wire to the frame that is in contact with the
> back side of the tube ( the grayed area ). With the screw driver,
I would recomend against doing this. If there is a significant charge on
the CRT, there will be a high peak current when the screwdriver makes
contact. This can damage the connection between the anode coating and the
connector, and more seriously it can (particularly if you happen to use
'any old ground point' rather than the outer coating of the CRT directly)
damage semiconductors all over the instrument.
I'd always include a suitable high-voltage-rated resistor in series with
the discharging lead. As I said, I normally use my EHT voltmeter.
-tony