[Gllug] Two Questions

[Chris Bell]

On Wed 09 Feb, Nix wrote:
> 
> On Wed, 9 Feb 2005, Chris Bell said:
> >    It is usually safe to remove the power and use a little watered down
> > washing up liquid to clean the screen, but there is always a continual
> > slight leakage of very high voltage charge to the front of the glass even
> > when switched off.
> 
> Out of sheer curiosity, how long does that charge take to dissipate?
> Weeks? Months?
> 
   The glass itself distorts under the high voltage, and the charge rebuilds
as the glass relaxes, so an old tube stored in dry conditions can give a
very nasty shock months after it was last used. It is good policy to leave a
permanent earth connection to the EHT connection, (it is dangerous to drop
an old tube when the EHT connection gets too close to your body when you are
carrying it!)

-- 
Chris Bell

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