CurtPalme.com Home Theater Forum

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

Hey CZ. Did you check to see if the neck was broken like Zebu asked?

Luckylad · Joined: 13 Sep 2007 Posts: 16

The P16 is a tube for a projection TV. The damaged tube that looks like spot burn is indeed what happenes when tubes are slammed very hard.

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

The P16 is a tube for a projection TV.

We have already established what the orig Ebay tube is for.

The damaged tube that looks like spot burn is indeed what happenes when tubes are slammed very hard.

I have been is this business alot of years and have seen tubes with broken necks and a few I broke myself Sad

and have never seen the face respond like this one. As for the pic Zebu posted, stated by Nuttall Chris, the projector was running when it hit the floor and could of lost deflection before the gun shut off. And as we all know the gun will still fire even with a broken neck, and possibly even hotter without a vacuum. As far as the size of the circle, if it were spot burn, it would start small and get larger as it burned. Like burning a piece of paper with a magnifing glass in the sun. Starts as a tiny dark spot and gets larger until it ignites. I'm not saying this could not be caused by being dropped, because stranger things have happened, but would like to have it confirmed for my own knowledge. So this is why I have asked, has anybody dropped a tube that was not in a projector that was on and then had this outcome? I do believe the theory of the broken neck causing it but just want it confirmed and not nessarily by a returned tube from shipping.

outwest · Joined: 17 Dec 2006 Posts: 212 Location: Honolulu

Sonynut is right on the money on this. I got a tube that looked exactly like this. The neck got snapped off during shipment due to very poor packing. The vacuum blasted all the debris down the tube and cleaned the phospher off the face of the tube in a spot that looked just like the tube in question here. FedEx denied any payment. They said that they do not allow shipping anything that is glass. I found FedEx to be very unsatisfactory to deal with. I could never get them to tell me what the final resolution of the claim was. The shipper kept saying that FedEx was going to pay. I just wanted to know if the shipper got paid for the tube twice, because if payment was made, it was going to be the shipper, not me. I just gave up. I was spending more time on the correspondence than the tube was worth.

CZ Eddie · Joined: 23 Mar 2006 Posts: 1601 Location: Austin, TX

Okay, I just peeled off the zillion layers of bubble wrap from the tube neck and confirmed that the tube neck did not crack.

The tube neck disspeared. No really, it's not there anymore. Laughing

GONE!

There are a zillion little glass shards all over the place though. I wonder where they came from?

dbaisey · Posted: Fri Sep 21, 2007 10:40 pm Post subject:

I haven't seen this before on the 8" tubes but I haven't seen a broken neck on a 9" 10PG tube before. Must be a vacuum volume, neck diam and velocity thing. Doug

Luckylad · Joined: 13 Sep 2007 Posts: 16

Zebu Fellenz · Joined: 21 Dec 2006 Posts: 2567

Eddie,

Can you snap a picture, I really would like to know what it looks like.

TIA,

Erik

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

Luckylad. Maybe I'm misunderstanding your post. When you say you just confirmed it, I guess your referring to your other post where you say when its slammed hard, are you saying it has happened to you? And do you mean slammed hard or broken neck? You didnt indicate broken neck in your post or if has happened to you.

stefuel · Posted: Sat Sep 22, 2007 11:45 am Post subject:

There is a clue here. Notice on all the pictures posted here. There is no distinct edge to the pattern and the sand blasting effect around the edge. The beam wouldn't shut off then on again for all those little fringe spots. I've only seen a few scan failure related tube problems but they all had distinct edges on the damaged phosphor area.

CZ Eddie · Joined: 23 Mar 2006 Posts: 1601 Location: Austin, TX

Tube "neck" by request.

Tinman · Posted: Sat Sep 22, 2007 6:11 pm Post subject:

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

stefuel · Posted: Sun Sep 23, 2007 12:06 am Post subject:

OK, who's got the balls to intensionally smash a tube neck and post the before and after result. Twisted Evil

**AnalogRocks** · Posted: Sun Sep 23, 2007 1:07 am Post subject:

Well if someone's going to do that we need it well lit and some video posted on You Tube.

Zebu Fellenz · Joined: 21 Dec 2006 Posts: 2567

I think Curt may have a few extra (burned out) tubes to try this on. Heck he may have enough to do a sample of every type of tube Shocked

C'mon Curt, help us end this in the name of science Thumbs Up

Erik

stefuel · Posted: Mon Sep 24, 2007 9:44 pm Post subject:

I think I have a spot-burned P19 green here someplace. I'll only have one shot at this so I'll see if my lab assistant (Heywood Jablome) will assist me. I'll do the smashing and he can run the camera's and pop the beers. My Sony digital camera can do short video's and I'll back it up with Sony Hi-8. OK, let's get drunk and smash some tubes. Laughing

**Curt Palme** · Posted: Mon Sep 24, 2007 11:37 pm Post subject:

I've seen and done this. You need to snap the neck suddenly with a shear impact. That pix is of a snapped tube neck.

YOU can try it.

I won't.

Very Happy