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Is AM used for anything other than AM Radio?

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RFFR

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Hi there,

I'm trying to determine if AM is used for any signal types other than AM broadcasts. I did some googling and was able to find that SSB is considered a "variant" of AM....is it still an AM signal? Aside from SSB, is there anything else that uses AM?

TIA
 

jwt873

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AM is 'legal' on pretty well all the ham bands where voice is used. AM Frequencies The only reason it's no longer common is because SSB is so much more efficient.

I hear quite a bit of AM on 80 and 160 meters.
 

KC4RAF

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Yeah, AM is still being used on many frequencies.
As 'jwt873' posted about the 80 and 160 meters; there's a collection of hams who use only AM and jokingly detest other modes of transmissions. I can't remember the website they employ, but it's an interesting forum.
 

spongella

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Here's one that is a little in the weeds - HAR or Highway Advisory Radio stations. These use AM since you can hear them on the upper end of the AM broadcast band from about 1600 kHz to 1710 kHz. When you are on a major highway you'll see signs directing you to a specific frequency on you AM radio for latest announcements.

Talking Signs and low power (100 mW) TalkingHouses used AM too.

Not sure since the digital transmission but I thought TV audio or the video was AM; feel free to shoot this one down fellow forum-ers. :)
 

jackj

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AM stands for Amplitude Modulation so Single Side Band is AM. It just has the carrier as well as one side band removed. The old NTSC video standard was partial side band, suppressed carrier, can't come up with the word for it. Digital transmission uses AM as well as FM at the same time.
 

nd5y

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The old NTSC video standard was partial side band, suppressed carrier, can't come up with the word for it. Digital transmission uses AM as well as FM at the same time.
Vestigial sideband.
Not all digital formats use both AM and FM at the same time. Some have neither.
 
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