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0 pointsphkahler3y ago0 comments

I don't recall why or how, but the A-B channel is of lower bandwidth, or otherwise more likely to drop out. Hence when you're starting to lose FM, you may find it dropping to mono.

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timmg3y ago

I think the reason is less interesting: when you start to go out of range, your radio thinks there is only a mono signal, so it switches to mono mode.

Same reason "static" on your TV is black and white. Your TV didn't detect a color signal, so it is looking for the black and white one.

(For anyone old enough to remember static on their tv :)

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