Uses for old TVs?

"Jim Thompson" wrote in message news: snipped-for-privacy@4ax.com...

I'm thinking repeating from remote locations, where line of sight is non existent. You could easily make a repeater IR in ==>IR out, but will it go where you want it? Time for mirrors? IR will reflect off of glass surfaces.

With the spare POTS pairs you could run very long distances. And most of the POTS is ~ CAT 3, which should handle up to 10mhz. So you should be able to plonk the 38khz carriers right on to it without much attenuation. The 485 bus can run upto 1mbps over short distances.

Cheers

If you live in Tornado alley, you can leave one set up in your shelter or in the house, just not turned on all the time. When storms are in the area, you turn it on, and tune the TV to Ch 12 or 13, whichever is devoid of broadcasters, and you watch the snow. You can turn the brightness down a little bit. Essentially, it works with any VHF dead air channel.

Pretty soon, you will see that the flashes on the screen match up with lightning flashes outside. The flashes, not the noise.

If there is a tornado in the area, or approaching, you will see the flashes increase and intensify. If you are ever unfortunate enough to see the screen fill up with flashes, you will know that there is a tornado very close. The deafening freight train sound might give it away as well.

So, tornado detector.

A miniscule amount. Your farts are more dangerous.

This I agree with.

Absolutely, though me and my brother's head never seemed to be able to break one when we were kids with capes on in the 60s.

Is it? Are you sure? Let's ask the phosphors.

Nope. Scanning a beam across a face by applying a voltage makes the scan (the final destination) move slower or faster, not the emitted electron itself.

Perhaps yours. All he did was ask a question.

More like particle emitter. No accel stage there. Not any more.

Build a mini-ring! Make your own 2MeV does nothing thingy! Oh boy!

My hobby? Taser gloves. Grab 'em -n- Tickle 'em! Tickle adjustable from true tickle to painful paralysis, to being "tickled to death".

Still working on: Piercing fingertip "applicators".

Yes, it will sell.

The anode supply can be up like 25kV to 32kV for all but the biggest CRTs and those are even more. That, through the electron gun, striking a Palladium ingot, will emit an X-ray flux. There are other target media as well, but essentially when an electron beam strikes a metallic target, there WILL be X-ray emissions. Some metals exhibit a far better flux than others. Angle of incidence comes into play as well.

The CRT's anode HVDC supply is OK, but the more pure the DC HV is, the more pure the X-ray flux will be, and the better the contrast ratio produced in any imagery will be.

Wow. I'll bet one of the old Heath Zenith cage array tuners would be cool to fool with. It was like an 8 inch long cage about 4 inches in diameter, IIRC.

Heath Zenith TVs were making pretty nice analog tuners, then Heath died, and Zenith went to digital methods.

Our early 60s 25" color Zenith lasted until the 72 lightning strike on the house.

I fixed so many tube TVs by cycling the tubes in and out of their sockets, burnishing the leads.It is amazing how mechanical the world was then compared to now. I guess I can't be the first person that has said that, but they all used to say MORE mechanical the world has gotten.

Electronics has turned that around, and we are no slowly but surely reducing the need for large mechanisms wherever we can.

Alas, even these miniature gadgets are "more" mechanical, so I am fooling myself.

Much better off finding an actual preferred medium like Palladium or such.

Computers are cheap. Big households have computers running in more than one room. Use the IR device and write some code for that PC to handle that "zone". Next.

Here is another fun use for manual tuner tv's of the past. If you can get the signal before it enters the display circuitry you'll have access to all sorts of public safety and other services soon.

On Jun 23, 10:56=A0am, snipped-for-privacy@uakron.edu wrote: > accelerator? >

1B3s were used in B/W sets WAY back. I think you're remembering the

G=B2

Use a conveter for the digital stations; and bypass for the analog ones still on the air.

Dunno about links, but one can use the long industrial fluorescent tubes for accelerator pipe; use 1" wide aluminum "ring" strips at regular intervals to equalize the field gradient. Galena ore mixed in concrete makes for a reasonable shield if you need.

How about

ope,

ith i=3D

ic...

id cr=3D

need.

Good idea on the tubes...why didn't I think of that.

Why galena ore versus lead sheeting? Cost and availabiity?

TMT

In the late '90s I read an article where a home owner built a retaining wall out of PS/2 Model 80 and 90 chassis.

No preference; use what is least expensive ad most available..