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So I bought a radio and for some days I have been noticing that a channel with static frequency at somewhere around 880 KHz Is tuning properly during day time but at night, the channel can be heard for a wide range of frequency, I mean , at night , the channels static frequency seems to be mixed up and the channels static frequency changes into a ranged frequency . That can be heard from almost 560KHz to 1000KHz (while 880KHz is the absolute and provides better sound quality).

I am using the radio in AM mode. This phenomenon usually happens at night.

Now my question is, what makes this phenomenon happen?

I hope my new radio isn't faulty

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    $\begingroup$ What station, and where are you? $\endgroup$ Aug 29 at 20:23
  • $\begingroup$ What type of radio program were you listening to, and what was its name? Some sports events and popular talk shows are simultaneously broadcast on many different radio stations. $\endgroup$
    – Mike Waters
    Aug 29 at 23:02
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    $\begingroup$ I am in india and that was news and entertainment channel the station is almost 200kms away from my house $\endgroup$ Aug 30 at 2:47
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It's possible that your AM radio has a very wide bandwidth (low Q filters), so high power broadcast stations far from the center tuned frequency can be heard, but are drowned out by higher RF noise levels during the day.

Crystal sets with a low Q inductor coil can behave this way.

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