Quote:
Originally Posted by CaryLee
What did they have, in 1950, that would require a VIDEO jack on a television?
|
As Electronic M mentioned in the other thread, his Majestic has the color output and so does my Majestic 712, which carries a common late 1950-1952 Majestic chassis.
The Sam's is here:
http://www.earlytelevision.org/tv_sc...s_postwar.html
Majestic apparently just relabeled and rewired the phono input switch on the back to be the "color" switch. However, they left the phono input in place and added a new phono switch in the pencil box as they assumed more people would be using that function than color. They would not want their kids reaching around to the back of the set to use their new RCA 45 RPM turntables that they kept on top of the TV.
I've not restored the set yet, but the color switch disconnects the cathode and G1 of the CRT and switches the video output via a .2 MFD capacitor to a three pin socket on the back. The phono switch apparently leaves the CRT running but blacks it out by causing the CRT cathode to go more positive.
Back before I switched careers and was doing TV repair (1957-1960), I remember two older sets coming in the shop that had these "color" adapters. At the time I was thinking NTSC color and assumed these were frauds. On one set the color socket was not electrically connected and the other went via capacitor to the video signal and did not have a switch. I cannot remember the brands, but the never-wired one was a copper color chassis.
Attached is the paste-on label on the back of my set.
Oops! My attachment just went bye-bye.