Sunday, Aug 05, 2012 at 23:10
Sorry but I have some older pushbutton radios lying arround and not all that long ago I replaced an old shaft & pushbutton set in my van with a quite moddest clarion CD radio.
The range and stability of the clarion bleep all over any older radio I have ever owned.
The modern digital PLL bassed radios simply dont drift because they are locked to a crystal stabilised clock.....the old analoge radios where physical tuned circuits that drifted with temperature.
In addition almost every modern radio has automatic gain controll, so there is much less need for a RF gain controll except in very high signal areas.
New radios can have higher sensitivity because they also have much better selectivity and tuning accuracy.
Remember FM is deliberaltly range limited, both by the frequencies used and the power allowed.......this is how there can be so many FM stations available.
I can pull 2UE(
sydney) on AM in
Brisbane any night of the week.....that is the way it has been since I was a boy...hell I used to pull 2UE on a crystal set.
FM will never have that range.
FM will work only a little past line of sight, pretty much the same as television.....200Km tops and then with everything going the right way.
Get a big
hill in the way & its buggered
cheers
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