AM/FM Frequency Range

Joe Hebert · April 2016

Can anyone confirm what the AM and FM frequency cutoff range is? I can't seem to Google a definitive answer.

I'm working with an Integra DTR tuner and the feedback for the frequency is always a 5 digit number but it doesn't come back with the band or a decimal point. Looking at someone else's code it looks like it assumes that everything that is 08800 and above is FM and everything below 08800 is AM? Is that the correct cutoff?

Thanks.

ericmedley · April 2016

HA! I KNEW I'd be able to use the handbook of my Class II Radio Phone Operator license some day!

FCC says:
AM in the United States is: 535 to 1700 kHz
FM in the United States is 87.5 to 108 mHz
Note that there are other places in the world that have differences. Japan and a lot of Africa are all over the map on this.

Joe Hebert · April 2016

That's the ticket. Thanks.

chill · April 2016

ericmedley wrote: »

HA! I KNEW I'd be able to use the handbook of my Class II Radio Phone Operator license some day!

Wow! Mine didn't come with a handbook. Just a fancy certificate, suitable for framing.

vining · May 2016

They do vary ever so slightly.
http://hyperphysics.phy-astr.gsu.edu...dio/radio.html
https://www.quora.com/Do-different-c...ir-FM-AM-radio
http://www.cybercollege.com/frtv/frtv017.htm

ericmedley · May 2016

vining wrote: »

They do vary ever so slightly.
http://hyperphysics.phy-astr.gsu.edu...dio/radio.html
https://www.quora.com/Do-different-c...ir-FM-AM-radio
http://www.cybercollege.com/frtv/frtv017.htm

yes they do. When I was a tot in Kansas City, I remember being able to tune our car and/or portable FM radio alllll the way down to the left and hear the audio for the KC TV station Chennel 4 (NBC at the time)

John Nagy · May 2016

ericmedley wrote: »

yes they do. When I was a tot in Kansas City, I remember being able to tune our car and/or portable FM radio alllll the way down to the left and hear the audio for the KC TV station Chennel 4 (NBC at the time)

That would be probably be channel 6 at the bottom of FM. That's adjacent to the bottom of the FM range around 86 mHz. There's a VERY LARGE gap below between channel 5 down to 4 at 69 mHz, .. can't imagine a normal radio with range down to that.. equivalent to the entire range of FM, again below. But there were "universal" multiband radios popular in the 50's and 60's that could receive all kind of stuff including TV and short wave...

AM/FM Frequency Range

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