[BC] Where old TVs go...

[Phil Alexander]

On 5 Jul 2005 at 18:51, David Reaves wrote:

> How dangerous could it be to break a TV tube? Even a full vaccuum is  
> only minus one atmosphere (14Lb./sq. in.)
> 
>   Not that I'm against experimenting, though. I'd be more worried  
> about the stored HV.
> :-)

A 27" set is roughly 16 x 20 or 320 sq. in. at 14.5 psi, or over 
4600 lbs. force on the CRT face. Accelerating a 1 pound chunk of
glass with that energy gives you a chunk of glass moving with a
"muzzle" velocity that is very significant. It could blow a hole
through you with ease. Demands as much respect as a small cannon.

In most the aquadag area on the outside of the tube was scaled 
down to a small area to limit the amount of HV charge. Usually,
the doorknob in the HV section had more Joules stored, but 
clipping a lead from the HV terminal to the chassis is still a
very good idea. <g>


Phil Alexander, CSRE, AMD
Broadcast Engineering Services and Technology 
(a Div. of Advanced Parts Corporation) 
Ph. (317) 335-2065   FAX (317) 335-9037





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