New 15GP22 on ETF Classifieds

[Eric H]

Anyone see this?

http://www.earlytelevision.org/classified_page.html

First listing under Parts, etc. for Sale

[ohohyodafarted]

Yep! Called him 2 days ago. He called me back this Am but I missed the call. He said he would call back again this evening.

[ohohyodafarted]

I just spoke with the owner of the tube. He purchased it new from the RCA distributor as a spare to install in a ct100 that he owned back in the mid 60's. He never got around to restoring the ct100 and so the tube has been sitting in the loft of his barn in Michigan ever since. The ct100 was left with a relative out east and when they closed the business out there the ct100 was trashed with many other electronic items.

He did not know if the 15GP22 was still good as it has not been tested. He is going to try and see tomorrow if the getters are still silver. If they are, then chances are good the tube is still good as it was never even hooked up to a tester since it was received.

I will post here again as soon as I hear anything about the condition of the tube.

Bob

[zenithfan1]

Good luck Bob, I hope they're still silver.

[ohohyodafarted]

I got a message from the owner of the tube today. He is not sure about the condition of the getters on the tube. He said they are not silver. I am trying to set up a meeting with him to test the tube for him. I am waiting to hear back to see if he wants to take me up on my offer.

More details to come as things develope.

Bob

[jstout66]

I hope it's still good, but am doubtfull because of the storage conditions. If it was stored in a barn, it is highly doubtfull the seal would be any good on it due to the extremes in temp. Even if that tube was stored in a climate controlled environment, it would be suspect due to the nature of the design. If the tube is good, it would be worth his asking price, but if bad, pretty high for a dud.

[Phil Nelson]

Does anybody know offhand how long the 15GP22 was in production? I didn't realize you could buy a new one in the mid-1960s.

Phil

[jeyurkon]

Originally Posted by Phil Nelson

Does anybody know offhand how long the 15GP22 was in production? I didn't realize you could buy a new one in the mid-1960s.

Phil

An article by EDWARD W. HEROLD in the Proceedings of the IEEE, Vol 64, No. 9, Sept. 1976 says that it was introduced in 1953 and only had limited production in 1954. It doesn't say that production ceased after that, but they seem to imply it.

The article is called "A History of Color Television Displays." I don't think I'll have any luck, but I'll see if they'll let me post it.

John

[andy]

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[Dave A]

From the 1965 Allied Radio catalog;

15GP22 $135.15
21AXP22A 103.77
21CYP22A 103.75
21FBP22 108.18
21FJP22 119.11

[yagosaga]

Originally Posted by Dave A

From the 1965 Allied Radio catalog;

15GP22 $135.15
21AXP22A 103.77
21CYP22A 103.75
21FBP22 108.18
21FJP22 119.11

Where have all these NOS tubes gone?

- Eckhard

[ohohyodafarted]

Testing of the tube will most likely occur the weekend of the 28th and 29th.

I believe RCA had excess inventory that was warehoused for sale as replacements. That is probably where replacement tubes came from. RCA also had the ability to rebuild tubes, and from what I uncerstand you could obtain a rebuilt crt and had to return a dud. Of course this is just hearsay and there is no way to confirm this.

Many of the 15G's we see have been renecked and rebuilt. No doubt some of the renecked/rebuilt tubes we see did not pass final inspection and were sent back to be re-worked.

[Phil Nelson]

A visitor to my website mentioned that he rebuilt a CT-100 in the 1960s. He got a used 15GP22 that had served in a Conrac reference monitor at a local TV station.

Phil Nelson

[Robert Grant]

Originally Posted by yagosaga

Where have all these NOS tubes gone?

- Eckhard

With the exception of the 15GP22, I would assume they went into color TV sets of the early/mid 1960's when their CRTs went out in the early 1970's, only to be thrown out later in the 1970's when something else (fly, yoke, power transformer or tuner) in those failed.

The 15GP22s pose another question. There may have been little demand for those tubes, as so few 15" color roundies had been made, and their owners may have decided to upgrade to a larger picture when their CRTs failed.

[jr_tech]

In the early 60s (perhaps '62- '63) a local paper ran an ad "new color tvs $75"... Since my parents had not purchased a color tv by that time, I pestered them until we went to take a look at these incredibly cheap sets. It turned out to be a blowout sale of unsold stock of CT-100s, to be sold with the understanding that when the tube failed, that was it... no replacement crts would be available! Well, that was not the deal breaker, since my parents figured that in a few years price/performance of new rectangular color tvs would be reasonable, so this set would only have to serve as a "placeholder" until that time. The problem was that these sets just looked terrible the way they were adjusted at the time. Most people at the sale just walked away, shaking their heads.
I think that they ran the same ad the next weekend, with the price reduced to $50.

If I would have known then what I know now, I would have smashed my piggy bank and bought as many as I could.

jr