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Radio Hacks

Does All Radios have this?
Many aftermarket car radios have, within their "settings"menues, a submenu usually called "area",
in which you can change the AM channel spacing (9 or 10 KHz),
FM channel spacing (200 KHz. 100 KHz, 50 KHz), and FM bands: 64-74, 76-90, 87.5-108.
If these were the 1930's and early 1940's, it would also likely have channels 21-99 from 42.1 to 49.9.
 
The Sangean 909X has a SiLabs chip in the FM IF chain (might be also in the AM IF chain), and SiLabs chips have the capability of being programmed to tune down into the 66-74, 76-90 Mhz ranges. This may be why the 909X can apparently tune down that far.

My Grundig G2 can tune down there; a lot of Tecsuns and newer Grundigs can also -- because they all use the same SiLabs series of DSP chips, which have that capability.
 
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