[time-nuts] [OT] degausing

SAIDJACK at aol.com SAIDJACK at aol.com
Sat Apr 17 01:05:31 UTC 2010

point of trivia:
can you count how many vertical wires are strung across a Trinitron  
monitors' shadow mask??
I used to work at Sony for a long time, we had a TV assembly line next door 
If you can see the vertical wires, you still have very good  eyesight...
In a message dated 4/16/2010 04:55:35 Pacific Daylight Time,  
cfharris at erols.com writes:

Are they  really?  For some reason, every Trinitron I have ever seen
has  clusters of little stick on magnets placed here and there on the
back of  the glass envelope.

The trinitron has a shadowmask.  It is a grill  of highly tensioned wires
that are positioned just behind the screen.   The original trinitron tube
was a little 5 inch diagonal CRT.  It had  to be small because the wires
tended to vibrate if the set was bumped, and  that made for some very odd
displays.  The later larger tubes had  horizontal titanium wires welded to
the backs of the shadow mask wires  every 5 or 10 inches, to prevent the
psychedelic color fest that happened  when the CRT got bumped.

The trinitron has three very carefully aligned  cathodes in the gun.  They
are positioned side-by-side, creating the  slight different projection
angles necessary to cause the long vertical  slots formed by the shadow mask
to eclipse the appropriate color bands on  the screen.

I'm not sure what you are describing; it sure sounds cool;  but it isn't
a trinitron.

Can you find some references?  I'd  like to read up on it.

-Chuck  Harris

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