24-06-2017, 07:39 PM
If you take 819-lines out of the equation, it isn't so bad. Stick to a common vision IF and arrange rejectors accordingly. It wouldn't do any great harm for System I, for example, to retain the System B/G/H bandwidth and mix the intercarrier sound with an 11.5MHz oscillator to convert the 6MHz to 5.5MHz.
Also, this is the era of the SAW filter. I've seen switchable DTV SAWs for 7/8MHz channel widths so it would probably be just as easy to produce a multiband version for analogue IF - or use more than one SAWF.
It would be interesting to see a service manual for one of these sets ...
Also, this is the era of the SAW filter. I've seen switchable DTV SAWs for 7/8MHz channel widths so it would probably be just as easy to produce a multiband version for analogue IF - or use more than one SAWF.
It would be interesting to see a service manual for one of these sets ...






