Two 15GP22s At TheBay

[TubeType]

Here are two 15GP22s I found for auction at TheBay.
Happy Holidays,

Terry Cheek

http://cgi.ebay.com/ws/eBayISAPI.dll...E:B:SS:US:1123
http://cgi.ebay.com/ws/eBayISAPI.dll...E:B:SS:US:1123

[newhallone]

I am dying to here the comants on these.

[Charlie]

FRAUD! FRAUD! FAKE!

Nah, I'm just kiddin!

It's interesting he mentioned it looks as if someone has rebuilt one of them. Wow... if that's correct, I wonder how many years back that was done?!

[jr_tech]

Originally Posted by Charlie

It's interesting he mentioned it looks as if someone has rebuilt one of them. Wow... if that's correct, I wonder how many years back that was done?!

I really wonder about that "rebuild"... look at the label on the tube... looks original factory to me. Did somebody carefully remove the label, rebuild the tube, then put the label back on the tube? Perhaps it was just a factory "re-neck" ?

I have never seen a listing for that gun type in any of the Superior Electronics catalogs that I have been able to find.

jr

[Dave S]

Originally Posted by jr_tech

I really wonder about that "rebuild"... look at the label on the tube... looks original factory to me. Did somebody carefully remove the label, rebuild the tube, then put the label back on the tube? Perhaps it was just a factory "re-neck" ?
jr

I've seen the tubes. The one with the weld on the neck definitely looks like a old rebuild. Or a "re-neck" but what's a re-neck? This is the second one I've seen like that. Untested unless Dave A or someone gets over there, but I can vouch that they're absolutely for real and lookin' good.

--Dave Sica

[jr_tech]

Originally Posted by Dave S

I've seen the tubes. The one with the weld on the neck definitely looks like a old rebuild. Or a "re-neck" but what's a re-neck? This is the second one I've seen like that. Untested unless Dave A or someone gets over there, but I can vouch that they're absolutely for real and lookin' good.

--Dave Sica

What I am calling a "re-neck" is something that occurs at the factory. For example, something goes wrong after the gun is sealed to the funnel, say a broken stem or a poorly annealed seal that cracks, or a defect is discovered in the gun... something like that. It is very easy at that point to simply remove the gun, seal on a new section of glass neck tubing and insert a new gun/stem assembly for a second try. If the labels on the tube look factory original, but the tube has an extra neck weld, I usually assume that it is a factory rework rather than a "rebuild".

jr

[Eric H]

I'll make one comment

"my CRT tester will not test this CRT"

If I had a $2000-$3000 CRT I'd find a tester that would test it, won't most of the B&K's do it if you use some alligator clips?

He's in N.J. I'm sure someone here would be happy to go test it for them?

[radio63]

Originally Posted by Eric H

I'll make one comment

"my CRT tester will not test this CRT"

If I had a $2000-$3000 CRT I'd find a tester that would test it, won't most of the B&K's do it if you use some alligator clips?

He's in N.J. I'm sure someone here would be happy to go test it for them?

The Sencore CR-70 will test a 15GP using the universal test adapter it comes with. That's what I have and that's what I have tested my 15GP22s with.

Gilbert

[Charlie]

Perhaps this would have been the grandfather of all RCA Colorama tubes!

[Dave A]

I have a 15GP22 adaptor I made for my Beltron. I am near the seller and sent a note asking to visit to check the tubes. Stand by.

[yagosaga]

Originally Posted by Dave A

I have a 15GP22 adaptor I made for my Beltron. I am near the seller and sent a note asking to visit to check the tubes. Stand by.

Did you test it? Today I found a note on #250527056091:

"Thanks to another Ebayer I was contacted by a very nice person who took the time to drive too my house and test this CRT. This person came in and tested The CRT with his custom made adapter for the CRT. As you can see this 15GP22 passed with Flying colors all three guns tested good. The CRT passed the ten second test. The Blew gun started to drop emission at 12 seconds after cutting power the green followed at 14 and the red gun at 15. Needless to say this is one good 15GP22."

[Pete Deksnis]

Originally Posted by yagosaga

Did you test it? Today I found a note on #250527056091:

I did the actual test as I was much closer to the seller's location. A homemade adapter makes the Beltron think it's testing a 21AXP22.

Pete

[Tom_Ryan]

I wrote the seller tonight to ask their reason for pulling the gassy tube off eBay. Everything has value ... even a dud gone to air.

[jeyurkon]

Originally Posted by Tom_Ryan

I wrote the seller tonight to ask their reason for pulling the gassy tube off eBay. Everything has value ... even a dud gone to air.

Hopefully he just wants to relist it to give people a chance to rebid knowing the true status.

John

[Robert Grant]

Question about testing a CRT in unknown condition:

If a CRT has gone to air, but nobody has powered the filament since before the vacuum was lost, could such a CRT be restored to operation by re-evacuating the tube, without have to do a total rebuild (assuming any leak would be extremely slow or could be found and closed)?

I say this, because I wonder if a test of an unknown CRT should start with a very low voltage continuity test of the filament, then, if there is any conductivity, doing some type of test for any presence of air in the tube.

Rather than just hooking up the tester, which would destroy the gun of the tube if in fact the tube had gone to air?