"Ross Herbert" bravely wrote to "All" (26 Aug 04 04:31:20)
--- on the heady topic of " Television discharge question"

RH From: Ross Herbert

RH |Realize, the crt glass has some leakage on the order of 10^14 ohms.
RH |discharge this is 2,500,000 seconds or about 1 month. Clearly after 4
RH |years there is practically no charge left.

RH The actual time will depend on;

RH a) moisture content of the atmosphere
RH b) conductivity to chassis

RH In practical situations it won't take anywhere near this estimated
RH maximum to self discharge to a safe level.


Yes, even dry air is about 100 times more conductive than glass but
this neglects that the circuit wiring and anode boot insulate the air
path. The remaining path, assuming the focus divider is open circuit,
is via the HV rectifier but its leakage is of the same order as glass.
So then that could double the speed of the discharge. Okay, 2 weeks?!

A+s+i+m+o+v

.... I know flyback, ultor, and 47 other dangerous words.