|
Also realize that the FM deviation of broadcast FM radio is much more than that used for the sound on analog TV. About twice or 3 times.
Oh, one could rig up the front end of an FM radio tuner (front end, local osc and RF amp module) to produce 4.5MHz IF instead of the usual 10.7MHz IF. But you could get problems with images of FM stations 9Mhz away.
And also, most manufacturers want to build stuff as large modules. Console TV radio sets were not made in high volume. So the easiest and ultimately cheapest way to build consoles is to use the entire chassis and CRT of the same TV they are making many of, and also use the chassis of AM/FM/phono sets they may also be making, or procure from another maker who does make many of them. Or use say the front ends and IF strips of higher end hot chassis table radios that they are making many of, and tap some B+ and share the audio output stage of the TV chassis, and appropriate switching. But that starts to get to be an engineering effort.
__________________
|