#1
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RCA Radio-TV and Electronics 1953-1954
"RCA Radio-TV and Electronics in 1953-1954"
"Review...and a Preview" by David Sarnoff http://www.bretl.com/tvarticles/docu...s1953-1954.pdf |
#2
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Wonder what happened to all those color tubes.
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Admiral C322C2 Regent (Restoring) RCA CTC-7 Pensbury (Restored) RCA CTC-5 Westcott (Restored) CRA CTC--4 Director 21 (Restoring) |
#3
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Those tubes look like they have a metal shell. The shape is not that of a 15GP22. Are these tubes precursors of the 15GP22?
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#4
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Maybe the tube experts know what those CRTs are. At first, I thought 21AXP22, which has a metal bell, but those tubes seem to have a slightly narrower, longer bell than the 21AXP22 that was in my CTC-4:
The 21AXP22 also came after the 15GP22. Regards, Phil Nelson Phil's Old Radios http://antiqueradio.org/index.html |
#5
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Looks like it could be a C-73547 or possibly a C73293C. I know that the C73293 had its limited production run in 52, but not sure of the C73547 production dates.
__________________
Admiral C322C2 Regent (Restoring) RCA CTC-7 Pensbury (Restored) RCA CTC-5 Westcott (Restored) CRA CTC--4 Director 21 (Restoring) |
Audiokarma |
#6
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Definitely pre-15G prototype tubes. A member briefly had an operational example before the neck cracked, and a Detroit area collector claims to have an under-vacuum but otherwise untested example in a Sparton prototype. Unfortunately his asking price is far beyond what I'm currently willing to pay; I've remained in touch though and we may be able to make a deal before I leave the area. We'll see I guess...
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