Re: Old television danger?

On Tue, 25 Sep 2007 08:25:33 GMT, "Smarty" <nobody@xxxxxxxxxx> wrote:

One word of additional advice.....regarding the suggestion below to: "just
use unsulated plyers to yank that wire off the CRT"...


The connection you are removing from the CRT is the so-called 2nd anode high
voltage connection, and lies beneath a protective insulation 'rubber suction
cup' placed there to prevent accidental contact. The actual connection is a
spring loaded / springy, flexible contact which has been compressed before
insertion into the tube receptacle.

"Yanking it off" adds the very real risk of breaking the glass envelope of
the picture tube. The connector was not designed to be yanked, and moreover,
the glass contact on the tube is also not designed to withstand very much
force / tension. The correct removal technique is to compress the springy
contact, causing its' "hooks" to retract", then gently removing it from the
glass tube.

I hate to nit-pick other excellent advice such as was given below, but the
risk of glass damage and the remote possibility of the CRT imploding are
real issues, and perhaps as dangerous as the issue of a shock hazard. I felt
I had to throw in my 2 cents.

Smarty


You are correct, I should have been a little more specific on that
point. Actually, since this tv is going to the scrap heap except the
wood cabinet, that wire could just be cut. Just leave the suction cup
part on the CRT. Actually, if cut right at the chassis, take the
plyers and touch that cable to the chassis to be sure the CRT is
drained. The wire should be long enough if cut in this manner.

By the way, is this an old tube set? If it is, tubes are worth some
money to antique rebuilders these days. More than likely most of them
are still good. One bad one can kill a tv. I used to work on tvs
when I was in my teens, and I saved all the tubes. I have boxes of
them. Some day I plan to sell them and I may be sitting on a small
fortune. So, if it is, save the tubes.



<alvinamorey@xxxxxxxxxxx> wrote in message
news:v3bhf35hhu0lek4qkp2o30ger4nvhi8ln7@xxxxxxxxxx
On Sun, 23 Sep 2007 14:25:03 -0700, Oren <Oren@xxxxxxxxxxx> wrote:

As a kid I was taught a television still retained energy; even after
being unplugged from the power source. I have a 1987 console TV with a
nice wood cabinet on a swivel base. I want to remove the innards and
make a cabinet for entertainment equipment.

Now, it has NOT been in service for many years and I doubt there is a
real shock hazard.

If I did plug the TV back in how long would it take to ensure there
was no stored energy? Or am I off base altogether about the energy
danger?

Thanks.

While you can get a good jolt immediately after shutting off the power
on an old tv, espeicially those old tube sets, your fears are over
rated. After you unplug it, let it sit during your dinner and it will
be safe. Or leave it overnight to really feel secure. The biggest
risk spot is the high voltage cable to the CRT (picture tube). Thats
a thick wire with a rubber suction cup (looking) thing that is
attached to the picture tube itself. If you want to work on the tv
soon after unplugging it, just use unsulated plyers to yank that wire
off the CRT, then touch the bare end (under suction cup) to the metal
chassis. The capacitors terminals are under the chassis. Theres no
need to stick your hand down there, but they discharge in minutes
anyhow. Neither of these will kill you (with tv unplugged). It will
just wake you up and make you say the f-word. It's about the same
thing as touching a spark plug wire or electric cattle fence. So,
relax.....




.

Relevant Pages

  • Re: Old television danger?
    ... use unsulated plyers to yank that wire off the CRT"... ... The connection you are removing from the CRT is the so-called 2nd anode high ... insertion into the tube receptacle. ... After you unplug it, let it sit during your dinner and it will ...
    (alt.home.repair)
  • Re: Quick-Seine Net?
    ... handle off completely so I ended up with just a rectangle of wire and the ... be retracted into a tube, with the tube being the delivery and retrieval ... This will be the net frame. ... than the cord and thread the cord through the tube and through the cap. ...
    (rec.outdoors.fishing.fly)
  • Re: making thermocouple temp probes?
    ... already have some thermocouple wire rated ... > was to TIG one end shut on a 2" length of the tube and use ... between the 2 wires then you could get a secondary junction there. ... Make sure you are getting sufficient immersion depth into the exhaust ...
    (sci.electronics.basics)
  • Re: Quick-Seine Net?
    ... >handle off completely so I ended up with just a rectangle of wire and the ... Here's a way to build a cheapy sampling system with some PVC, cord, ... be retracted into a tube, with the tube being the delivery and retrieval ... This will be the net frame. ...
    (rec.outdoors.fishing.fly)
  • Re: devacuumizing a crt
    ... the body of a tube with a sledge hammer, ... striking the bulb with the curved part ... A CRT out of it's mount and totally exposed is a different situation. ... A hit from a .308 will implode a TV CRT no matter where you hit it. ...
    (sci.physics)
Loading