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RCA 15GP22 serial numbers?
http://www.videokarma.org/attachment...1&d=1664814703
Anyone know what the prefix letters stand for on this 15GP22 serial number? L=Lancaster ? B= ?
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Personal website dedicated to Vintage Television https://visions4netjournal.com |
#2
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Leaky Bulb
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#3
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There you go ;-)
Is this one the six thousandth, four hundredth, thirty sixth example ? How many were made ?
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Personal website dedicated to Vintage Television https://visions4netjournal.com |
#4
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#5
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I'm glad I'm in good company, when I saw the "LB" my first thought was "Leaks Badly"
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Audiokarma |
#6
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My thought for "LB" was "Lousy Bondings"
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=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために |
#7
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LB likely bad.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#8
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One would think that they started with serial number 0001, but I find it hard to imagine that they made over 6,400 of these tubes. Maybe they did when you count all of the CRTs made for other manufacturers. After all, they did make 4,400 CT-100s. It's also possible that they assigned a serial number before the tube was tested. That would mean a lot of rejects used up a serial number.
I like Tom C's definition of "LB." |
#9
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RCA did sell to other manufacturers, explaining the high number and some manufacturers built their own based on RCA specs. A mystery.
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Personal website dedicated to Vintage Television https://visions4netjournal.com |
#10
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I can’t imagine who’d have the resources besides RCA to build that tube, even under license.
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Audiokarma |
#11
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Philco, Westinghouse, General Electric.
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Personal website dedicated to Vintage Television https://visions4netjournal.com |
#12
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CBS didn't just make 15GP22. They one upped RCA and figured out how to deposit phosphor onto the inside of the face of the envelope (without reducing the ability to obtain good purity and convergence) and came out with a 19" version of the 15GP22 the IIRC 19VP22... Motorola, CBS, Westinghouse and others actually made sets with the 19V.
RCA was so ticked off their $6M invest in CRT tech was obsolete that they bought the patent from CBS them came out with the 21AXP22 to obsolete the CBS tube... During the time the 19V was the best tube on the market RCA refused to modify the CT-100 (it would have only been cabinet modifications) to use the 19V and because of that waiting and customer frustration with their current product being essentially obsolete. They had to basically hack together the 21CT55 to take the 21AXP22 as a stop gap till the CTC-4 was ready.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#13
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Quote:
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Personal website dedicated to Vintage Television https://visions4netjournal.com Last edited by etype2; 10-07-2022 at 06:46 PM. |
#14
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Just curious. Those of you with working 15GP22 sets, how often do your fire them up and watch them. Spats bear on YouTube was the last one I watched the rebuilding process.
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Sony Trinitron is my favorite brand. My wish list: Sony KV-7010U Sony KV-1220U |
#15
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Quote:
I watched his video, fun. YouTube deleted some of my videos, even though they have brief broadcast clips. Others okay and they put ads on. Would love to see more 15GP22 videos.
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Personal website dedicated to Vintage Television https://visions4netjournal.com |
Audiokarma |
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