There is no picture tube / Ugly tv set

Dark Matter...

Awwww, come on now...... Those Picture Tubes contained years worth of pictures. Just think of all the pictures of those old westerns, the guns, cowboys and horses, and all those Green Acres series, and Mr. Ed, I love Lucy episodes, and all those old soap operas.... All of that adds up a lot of weight, and that's only for UNFRAMED pictures. My old set worked almost 50 years, that's billions of pictures that were all stored inside that tube. That must be why it finally died, the tube just ran out of pictures.

I did notice the old set was lighter when we hauled it to the trash, than it was when we first bought it. I suppose all those pictures were what caused the weight when the set was new, and with all the pictures gone, it got lighter.

On a sunny day (Mon, 17 Dec 2012 04:07:56 -0600) it happened snipped-for-privacy@Mount.Carmel.home.com wrote in :

Who Framed Roger Rabit?

New sets are good for 100 years, but they change the system every 5 years now, so you need to buy a new box full of pictures every 5 years.

Be careful, I was reading that even singing 'Happy birthday' in public makes you have to pay to Holy-wood. Make sure none of them pictures escaped from that tube in public, else you will be very poor.

These days you can buy little shiny disks with pictjers on it, and play it over the set. That way you need no ant-ennes :-)

The people, or the electric forklift? ;-)

No, Disney owns the copyright.

That's actually quite dangerous. The tubes contain a vacuum, and when you release this it can accidentally be inhaled. Fortunately, vacuum is less dense than air, so it will float up into space, but it is possible (though unlikely) that it will get sucked into a jet engine on the way up causing the flame to extinguish.

If you must do this, you should always bag the vacuum and dispose of it properly.

--
Syd

It was common knowledge, perhaps urban rumor, that a picture tube, if broken, could fling enough glass around to be lethal. I once tossed a brick at one, and it made an impressive boom.

--

John Larkin                  Highland Technology Inc 
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Hot wire cutters don't break glass? The gun's not in the neck?

--

John Larkin         Highland Technology, Inc 

jlarkin at highlandtechnology dot com 
http://www.highlandtechnology.com 

Precision electronic instrumentation 
Picosecond-resolution Digital Delay and Pulse generators 
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Photonics and fiberoptic TTL data links 
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Order of mag off, somehow. The P400 weighs 7 lbs, which is mostly enclosure. It's about 8 if you add the external 24 volt power supply.

--

John Larkin         Highland Technology, Inc 

jlarkin at highlandtechnology dot com 
http://www.highlandtechnology.com 

Precision electronic instrumentation 
Picosecond-resolution Digital Delay and Pulse generators 
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Photonics and fiberoptic TTL data links 
VME thermocouple, LVDT, synchro   acquisition and simulation

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Sigh. It gives a good, clean line and the vacuum holds it in place till enough air slowly leaks and allows it to fall off. if the gun wasn't "In the Neck", you wouldn't need to cut away the glass base to remove a bad electron gun. I considered buying a CRT rebuilding business about 40 years ago so I investigated the entire process and the process was called 'Cutting', not 'Breaking'. Then I was drafted before I could scrape up the rest of the 10K they wanted for the equipment & stock. You would know that if you had ever worked with rebuilt CRTs.

a shop

Here you go:

I had to settle for adding only about 9 lbs to the radio

Oh, that could have been quite amusing! I can see adding a bunch of Tungsten bars in the radio, and adding HUGE cargo handles on the side, and two big gorillas having to pick it up.

Jon

Oh, yeah, many computer LCD desktop stands have a big chunk of metal in them to counterbalance the screen.

Jon

across

Oops(tm). Factor of 12 off. Instead of dividing the square inches by

12^2 to convert to square feet, I divided by 12^3. Doing the arithmetic again:

Box is 8" x 12" x 4.5" Area of the sides are: 8"*12"*2 = 192 8"*4.5"*2 = 72 4.5"*12"*2 = 108 ====== Total = 272 sq-in = 2.58 sq-ft I'll use 3.0 sq-ft to include any extra bracketry and flanges.

Steel = 3.0 sq-ft * 2.5 lbs/sq-ft = 7.5 lbs Aluminum = 3.0 sq-ft * 0.717 lbs/sq-ft = 2.2 lbs

Which gained 7.5 - 2.2 = 5.3 lbs or the approximate weight of a common red brick. Yeah, that should work, without shipping a brick with each unit.

--
Jeff Liebermann     jeffl@cruzio.com 
150 Felker St #D    http://www.LearnByDestroying.com 
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across

We were going to put a big steel plate in the bottom, but it was easier just to make the whole enclosure out of steel.

--

John Larkin         Highland Technology, Inc 

jlarkin at highlandtechnology dot com 
http://www.highlandtechnology.com 

Precision electronic instrumentation 
Picosecond-resolution Digital Delay and Pulse generators 
Custom laser drivers and controllers 
Photonics and fiberoptic TTL data links 
VME thermocouple, LVDT, synchro   acquisition and simulation

shop

Actually, the evacuating tip inside the socket center is the ideal place to let air in . . . BUT one still should use all caution just in case of implosion. Then a very hot (to red-hot) quartz rod can be "scribed" around the neck near the socket, and the electron gun then can be replaced. Replacement of the phosphors (if needed) is a bit different and takes a lot more fancy equipment, knowledge and technology.

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Installing the electron gun seems easy compared to putting in the phosphors. I always wondered how they put those phosphors one the screen. Were they painted on before the tube was molded, or sparyed in there, or what? And color set tubes were even more complicated. All those tiny dots of the 3 colors, that I never understood. I can only assume some sort of robotic device.

a shop

AFAIR, they registered the phosphor dots of a color CRT using the shadow mask, so alignment was automatic.

I remember accidentally snapping the little evacuation nipple at the back of a b&w crt- the air rushing in blew a spot off the phosphor right in the middle of the screen. Must have been maybe 12yo.

Best regards, Spehro Pefhany

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Yes, that's how I remember it. During the introduction of colour TV in the UK, various short films were shown as 'trade test transmissions', there being otherwise no daytime TV at the time. This was one such from Mullard, showing the manufacture of a colour CRT...

Cheers

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Syd