I saw this CRT on ebay and can't see why the seller thinks it's so valuable. I can see it's a metal glass combo but is there more to it than that? Afterall he doesn't even know if it works.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140526032052&ssPageName=STRK:MEWAX:IT


What's the best way to ship a metal glass tube anyway?

John

It's not - he's nuts ;) Here's a thread discussing this parted out set (http://www.videokarma.org/showthread.php?t=250649).
Check out his other auctions :no: http://shop.ebay.com/tolefreeitems/m.html?_trksid=p4340.l2562

I have several original shipping boxes for 10BP4s. They had the crt pointing face (heavy) side up with cardboard bracing to support it.

The value is pretty much zero unless it's tested and good, then it might be worth $100 to someone.

He's had that and the other parts to that set up for months after it didn't sell whole for $400 or some ridiculous price. It was a rotted mess.

Maybe he got his feelings hurt after we ridiculed it?

It's not - he's nuts ;) Here's a thread discussing this parted out set (http://www.videokarma.org/showthread.php?t=250649).
Check out his other auctions :no: http://shop.ebay.com/tolefreeitems/m.html?_trksid=p4340.l2562

I have several original shipping boxes for 10BP4s. They had the crt pointing face (heavy) side up with cardboard bracing to support it.

I have a 19AP4B that I would part with but haven't offered it for sale because I think these metal glass tubes are too fragile to ship unless extreme packing is involved like completely incaseing it in expanding foam.


Here's what I think might work..

first completely inclosing the tube in a big plastic bag like a giant grabage bag. This will keep the foam from getting into the small joints. Then test fit it in a box that's at least 3 inches clearence on all sides.

Next put in some expanding foam in the bottom of the box and as it's expanding put the CRT in and let the foam start coming up around the sides of the CRT. After that foam is done expanding then put in more foam and let it fill in the rest of the box.

Seal the box like normal. In so doing the glass plastic seals would never be put under stress. I don't think the foam would add that much weight and would almost guarentee a safe delivery.

That's not to say the the filament couldn't be damaged in the shipping process but at least the metal glass seal would be protected. I don't think a second box would be necessary.

The buyer would just brake off the foam and retreive the CRT. Has anybody tried this and if so how did it work out
Also I think there as different kinds of foam and I'm not sure which one would work best.

I've shipped large monitors in the past using the method you discribed. Never had any break.

Thanks for the feedback. What kind of foam did you use?

Expanding foam is excellent for cushioning, but not for compressive loading. Cardboard ribbing works best for protecting against compressive loading. Perhaps a combination of the two might work best.

Cheers,

Thanks for the feedback. What kind of foam did you use?

I use marine foam from U.S. Composites in florida, they have different densitys and expansion rates. Comes in quarts and gallons. 1 part to 1 part mix ratio. Once you mix it you got about 2 min. to get rid of it :D

oouuh ah. two minutes. that's short notice. I guess if everything was set up and ready it would work. How about cutting it in case one puts too much in and what about removing it once it arrives at it's destination? anybody who received one complain that it was hard to take off?

oouuh ah. two minutes. that's short notice. I guess if everything was set up and ready it would work. How about cutting it in case one puts too much in and what about removing it once it arrives at it's destination? anybody who received one complain that it was hard to take off?

If you wrap the item in a bag, you won't have much problems. The stuff sets up fast. I used to put some in the bottom first, let it foam up, then right before it sets set the item in, then mix some and pour around the sides.
You can cut it easily. You can score it with a knife and break it, like styrofoam.
I use this stuff when I refoam RV refrigerator cooling units. Some of the expansion rates are 30 to 1. Once you start using it, you get the hang on how much to use. Whatever you mix it in is trash after your done. Very large paper cups work good.

I see how it works now and I'm dying to try it. When you said RV refrigerator cooling units I got a clear picture of way it will look and act. I may do a thread on this some time as I don't think many people do it this way and I'm sure it would provide a lot more protection than peanuts, cardboard stuffing and double boxing.

UPS and probably Fedex too have what seems like to me a strange way of determining price. The box size can stay the same for a rather large change in weight and the price stays the same. When the box size increases, the price goes up even if the weight is less than the heavier small box. My point is if one can keep the box size small, no second box, then the price for shipping will automatically be less. I have used the peanut double box method and not only is it more work and cost more due to size, it really doesn't provide any more protection than a single box using the expanded foam method.

You might want to check uline.com for the instapack foam packets. It's a pouch with the 2 parts of the foam separated inside the pouch. When you rupture the internal divider, the chemicals mix. What you do is activate one, put it in the box, place your item in, activate another, and place it on top and then close and tape the box up. It contours to the object you put in. But if I remember correctly it requires some sort of machine to use them.

I've seen alot of motors and more sensitive items shipped using this, and basicly you would really have to beat the hell out of it to damage the item.

We use the Instapack at work. The machine is a heater that warms the packets before you use them. I think you might be able to just put them in warm water as a substitute. The machine is for convenience.

You might want to check uline.com for the instapack foam packets. It's a pouch with the 2 parts of the foam separated inside the pouch. When you rupture the internal divider, the chemicals mix. What you do is activate one, put it in the box, place your item in, activate another, and place it on top and then close and tape the box up. It contours to the object you put in. But if I remember correctly it requires some sort of machine to use them.

I've seen alot of motors and more sensitive items shipped using this, and basicly you would really have to beat the hell out of it to damage the item.

Uline.com didn't show any expanding foam products but I did find some on ebay called instapak Quick RT. 36/ per carton for 110.08. That's $3.00 per pack, probablly would need 3 or4 at most for a 19" CRT. Not bad cost wise considering the protection.
I think there's an Air Bag system available too that would probably get close to the same protection but I still like the solid foam better.

Uline.com didn't show any expanding foam products but I did find some on ebay called instapak Quick RT. 36/ per carton for 110.08. That's $3.00 per pack, probablly would need 3 or4 at most for a 19" CRT. Not bad cost wise considering the protection.
I think there's an Air Bag system available too that would probably get close to the same protection but I still like the solid foam better.

The stuff from U.S. Composites is way cheaper than that. To do a crt you would need their 1 quart kit.

Yourtube video on how to pack a monitor. I'm not convinced this will work for a vintage CRT. Pressure would be applied to the neck as the foam expands and being contained in the pack it couldn't flow, especially if the face of the CRT is being held in place. A poured foam wouldn't have that problem. The seal between the glass and the metal on the composite CRT is the critical issue. I wouldn't want those areas to be put under any unnecessary pressure. Even a CRT like a 12LP4 is fragile where the neck expands.

http://www.youtube.com/watch?v=F4YDzwEA3v0&NR=1

I slept on this overnight and have changed my mind a bit. I think it still needs to be double boxed. UPS is just to careless with these packages. The expanding foam will work great for the inner box and will provide a lot of rigidity which is what is needed in the inner box but without the second outer box the filiment will still be subject to shock damage.