1 Sep
2023
1 Sep
'23
12:02 a.m.
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.