great big screen

[ceebee23]

The "Spectacular" new 21" RCA color tv....

[JohnCT]

Originally Posted by ceebee23

The "Spectacular" new 21" RCA color tv....

What chassis is in that?

John

[Yamamaya42]

Originally Posted by JohnCT

What chassis is in that?

John

It almost looks like a prototype / modded CTC-3, http://www.earlytelevision.org/Deksnis/ctc3.html
Cause the CTC-4 had the controls on the right of the screen.

But I can't really seem to find what it is.

[Tom9589]

The CTC-3 is not a chassis number for a complete color TV. It is the designation for the convergence assembly for the 21-CT-55.

The TV in the picture is a 21-CT-55.

[Yamamaya42]

Originally Posted by Tom9589

The CTC-3 is not a chassis number for a complete color TV. It is the designation for the convergence assembly for the 21-CT-55.

The TV in the picture is a 21-CT-55.

Like I said, I was not sure what it was, and was just making a guess, thanks for clearing it up!
A very rare set!

[Electronic M]

Yup, the RCA model 21CT55 Chassis CTC2B. I'm lucky enough to own one of the ~40 known to still exist. This chassis is basically a CTC2 with sweep circuit modification to drive and converge the a 21AXP22, and one of the demodulator axes changed to R-Y.

[Eric H]

21 inch? Man, they'll never top that.

[DavGoodlin]

Chassis # CTC-2 was used in model # CT-100.
Assuming there was never a CTC-1, and like channel 1, they both only existed in Sarnoff's dreams.

[reeferman]

Channel 1 was not a dream but a short term reality.
There was no CTC-1 but there was a Model 1 (through 5).

[Yamamaya42]

Originally Posted by reeferman

Channel 1 was not a dream but a short term reality.
There was no CTC-1 but there was a Model 1 (through 5).

correct, my FADA (RCA 630TS clone ) has channel 1

[Tom9589]

Does anyone know the real reason Channel 1 was originally assigned for television and then taken back in the late 40s? Did any TV station actually have that band assigned? Iv'e heard stories about needing that band for some type of radar. Another story is that it was used for some public safety band or military band.

Curious minds want to know.

[Yamamaya42]

Originally Posted by Tom9589

Does anyone know the real reason Channel 1 was originally assigned for television and then taken back in the late 40s? Did any TV station actually have that band assigned? Iv'e heard stories about needing that band for some type of radar. Another story is that it was used for some public safety band or military band.

Curious minds want to know.

perhaps they did not want any station going around bragging... " We're number 1!! We're number 1!! "

[old_tv_nut]

Originally Posted by Tom9589

Does anyone know the real reason Channel 1 was originally assigned for television and then taken back in the late 40s? Did any TV station actually have that band assigned? Iv'e heard stories about needing that band for some type of radar. Another story is that it was used for some public safety band or military band.

Curious minds want to know.

https://en.wikipedia.org/wiki/Channe...th_American_TV)

Quick and dirty: There was a bunch of fiddling with the exact frequencies for experimental TV in this band until the original NTSC (monochrome) specs were agreed. FM radio was going to be there instead. Eventually, FM got moved to its present band and the channel 1 band got assigned to land mobile (I think both police and things like taxi dispatch).

[Electronic M]

Also around 1948 when CH1 started disappearing from TV dials the FCC instituted a VHF licensing freeze to deal with VHF signal propagation exceeding predictions and causing interference. At the time UHF was one of the options for dealing with the VHF issues, and UHF could benefit from IF frequencies in the CH1 band. There were probably design considerations related to that which facilitated it's elimination.

[old_coot88]

Originally Posted by Yamamaya42

correct, my FADA (RCA 630TS clone ) has channel 1

On the rare occasions we got a Fada in the shop, one of us goofballs would quip, "well here is da Fada. Where is da Mudda?"