the picture tube problem

[Eric]

A trade Email repair group told us, if you have a picture tube with a poor
brightness. if you run the heaters (TV not going of course) on 12 Volts for
15 Minutes then down to 9 Volts for 5 Minutes it would boil the rubbish off
the cathode,

The first time I tried this it worked great (with a Philips TV), and got a
real good improvement in picture brightness, since then I have tried it
again a few times, just the other day with a Sony TV it turned out so poor,
it makes me think I should not try it again. has anybody else tried that?

I would not suggest you try it at home with someone else's TV, you might get
a whack round the ears and sent to bed without any meals. It's funny how
it worked great the first time and failed about twice since then.

From Earnie Little.

 

[Rod Speed]

Eric <some1@clare.co.nz> wrote in message
news:3f6cb696$1@clear.net.nz...

A trade Email repair group told us, if you have a picture tube
with a poor brightness. if you run the heaters (TV not going
of course) on 12 Volts for 15 Minutes then down to 9 Volts
for 5 Minutes it would boil the rubbish off the cathode,

Its more complicated than that, particularly on that rubbish bit.

The first time I tried this it worked great (with a Philips TV), and got a
real good improvement in picture brightness, since then I have tried it
again a few times, just the other day with a Sony TV it turned out so poor,
it makes me think I should not try it again. has anybody else tried that?

Yep, its been one thing some do for decades now.

I would not suggest you try it at home with someone else's TV, you
might get a whack round the ears and sent to bed without any meals.

Or a retrospective abortion.

It's funny how it worked great the first
time and failed about twice since then.

If the emission is dropping substantially because its passing its
useby date, that approach wont return it to new performance
and repeats will see it time for a new tube.

From Earnie Little.

You got one of those multiple personalitys ? Or is Eric the sheep ?