Channel 1?

[ChrisW6ATV]

TV channel 1 was actually 44-50 MHz in 1946-48, not 50-54 MHz (which was a ham-radio band starting in March 1946, and still is). Cable channel 1 is either ~72-78 MHz (IRC) or ~71-77 MHz (HRC) on some cable-ready TV sets.

If you want to create a signal on either one of the "cable" Channel 1's or the broadcast Channel 1 receivable on postwar TV sets, the best way would be to use an "agile" modulator as used in cable-TV or hotel/hospital-type local TV distribution systems. You would need a truly programmable one such as some made by Olson Technology, that allow selection of frequencies in 1-MHz or smaller steps as opposed to the ones that just let you pick TV channels directly, since most of those will not include cable Channel 1, much less the old broadcast one.

One day, I want to try this as well.