On Thu, 31 Aug 2023, Mike Katz wrote:
The roots of this standard go all the way back to the 1930's and became a standard in 1940. By passing the tuner meant bypassing all of the filters and demodulation that needed to happen. Many video games of the 70's and early 80's came with 300 Ohm antenna leads and an RCA plug with a switch for modulated or unmodulated signals.
That little switchbox was so that the RF input of the TV could be switched between the [normal] antenna, and the RF modulator of the Computer/vide game. With almost all of them, the output was to the TV, and the inputs were antenna VS computer/video game
Without that switch, if they were just hooked in parallel, then the output of the computer/video game could leak/boadcast out of the antenna.
