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-   -   12" crt (http://www.videokarma.org/showthread.php?t=257175)

Geist 01-31-2013 12:45 PM

12" crt
 
Hi All;
I am just wondering.. My RCA uses a 10BP4 and many later sets used 14" and 16" CRT's.. How prevalent was the 12" CRT, in the Early TV Sets.. I know Admiral (not Admiral Bob) used a 12" CRT while others used 10", 14", etc. Was the 12" used by others at this time, or just Admiral ??
THANK YOU marty

Einar72 01-31-2013 01:05 PM

Motorola, Packard-Bell, and Philco, to name a few.

dieseljeep 01-31-2013 01:10 PM

Quote:

Originally Posted by Geist (Post 3060800)
Hi All;
I am just wondering.. My RCA uses a 10BP4 and many later sets used 14" and 16" CRT's.. How prevalent was the 12" CRT, in the Early TV Sets.. I know Admiral (not Admiral Bob) used a 12" CRT while others used 10", 14", etc. Was the 12" used by others at this time, or just Admiral ??
THANK YOU marty

Just about everyone in the TV business used them. They weren't as common as the 10BP4, but a lot of 12" sets were sold. They were just a little more expensive than the 10" sets
IIRC, 1951 was the last year for 12" sets. The Philco Neotron??? :scratch2:

bandersen 01-31-2013 01:25 PM

Here are a few I know of. There are many others.

Admiral: 22X12, 24C16
Dumont: RA-103
Crosley: 9-407
Motorola: 12K1, 12K2
Philco: 49-1240, 50T-1401, 50T-1402...
RCA: T-120
Sonora: 302
Stromberg Carlson: TV-12
Zenith: various porthole models

Geist 01-31-2013 02:26 PM

Hi All;
Thank You to everyone, I had no Idea that there had been so many 12" Sets made.. Since Except for the TRK-12, and it was not magnetic deflection, like the post-world war 2 TV sets.. I had not heard of many 12" Crt's.. I guess that the 12" was not as popular as the larger 14" to 16" at that time period.. Are the 12" CRT's hard to find, compared to the 10BP4.. THANK YOU Marty

dieseljeep 01-31-2013 03:18 PM

Quote:

Originally Posted by Geist (Post 3060815)
Hi All;
Thank You to everyone, I had no Idea that there had been so many 12" Sets made.. Since Except for the TRK-12, and it was not magnetic deflection, like the post-world war 2 TV sets.. I had not heard of many 12" Crt's.. I guess that the 12" was not as popular as the larger 14" to 16" at that time period.. Are the 12" CRT's hard to find, compared to the 10BP4.. THANK YOU Marty

The 12AP4, used in the TRK12 is magnetically deflected. :scratch2:

kramden66 01-31-2013 03:24 PM

others like magnavox , garod , westinghouse , andrea too used 12" tubes , 12L4 being used a lot , philco also had that weird one 12wp4 ? , dumont had 12qp4 which is simular to 12lp4 just a little shorter.

mike

bandersen 01-31-2013 03:43 PM

Quote:

Originally Posted by Geist (Post 3060815)
... Are the 12" CRT's hard to find, compared to the 10BP4.. THANK YOU Marty

Yes, in my experience they are. Especially the aluminized 12KP4.

Geist 01-31-2013 04:15 PM

Hi All;
My mistake, I must have confused the Trk 12 with the trk 7 or one of those pre war sets, with the 7 inch screen..
THANK YOU marty

Steve McVoy 01-31-2013 06:20 PM

Marty, you are probably thinking about the 5AP4 and 5BP4, which were used in several prewar sets. They used electrostatic deflection. So did the DuMont 14AP4.

Bill R 01-31-2013 06:45 PM

I have a 12lp4 CRT, but no set for it. Anyone want to send me one? :)
I could give it a good home.

Eric H 01-31-2013 08:10 PM

Quote:

Originally Posted by Bill R (Post 3060835)
I have a 12lp4 CRT, but no set for it. Anyone want to send me one? :)

Boy do I ever, I have a very nice and complete small (relativity speaking) Philco Combo with a bad CRT. Unfortunately it's here in California and you're in Tennessee.

Geist 01-31-2013 08:35 PM

Hi All;
I saw one of the other members was moving from Virginia to California.. Don't recall where I saw that posting.. Maybe IF Bill R., would be willing to sell the 12LP4, instead of looking for a set, maybe the member from Virginia could transport it to California for Eric H... Just a thought..
THANK YOU Marty


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