21” RCA Color in 1951

[Tom9589]

The front panel knob configuration looks like the same configuration as the 16 " Tricolor Kinescope receivers 1 and 2.

It could be a mock-up, too. (Photoshop wasn't around back then)

[jhalphen]

Hi to all,

I am very skeptic about an RCA working color CRT in 1951.
For the following reasons :

- Making the 12" 15GP22 was absolute hell : a suspended flat color phosphor plate which frequently cracked during high-temp processing.

- The phosphor plate was produced by silkscreen printing : poor precision and lots of rejects. Much more difficult with 21" than 12".

- The CBS rear-of-screen phosphor deposition process via a lighthouse hadn't been invented yet.

Maybe they made ONE that worked just for the IRE photo...

Best Regards
jhalphen
Paris/France

[reeferman]

A working 21" color prototype in 1951?
I'm like Kojak.
I don't buy it.
I have never seen any proof.
The following is from the late Ed Reitan's website.

"July 9, 1951. A 21-inch direct-view color picture tube was shown by RCA. (RCA used the term "shown" when equipment was not operational!)"

http://www.earlytelevision.org/Reita...bc_firsts.html

[John Adams]

Originally Posted by reeferman

A working 21" color prototype in 1951?
I'm like Kojak.
I don't buy it.
I have never seen any proof.
The following is from the late Ed Reitan's website.

"July 9, 1951. A 21-inch direct-view color picture tube was shown by RCA. (RCA used the term "shown" when equipment was not operational!)"

http://www.earlytelevision.org/Reita...bc_firsts.html

That makes sense. Appears that several proposed tubes never made it to production. Several CRT manufacturers used terms like "samples" which were furnished to manufacturers prior to production.