27-01-2019, 05:01 PM
I was wrong about intercarrier modulation. The MC44BS373CA has separate sound and vision modulators. I know that Darryl explained why System A couldn't be done with a single device but I forget the reason. I know that the combination of AM sound, +ve vision and 3.5MHz spacing wasn't possible. I'm not sure which of these 3 factors was the real problem. My guess is the 3.5MHz spacing, because the chip can do French style +ve vision with AM sound.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv







