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FM CB in US?


Shadetree Mechanic said:
Interesting although it might be slow to catch on. With all the converted 10m radios that have FM mode on 11m, I have never even heard of anyone using it. I wonder how much cost it would add to a radio?
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Your radios cannot have FM added to it. Just like you can't add SSB to a radio that was built as AM only. I wonder why they are talking about using FM in CB? Do they think FM won't skip? I can tell you for a fact it does. The wife and I were sitting on top of the tallest hill in Jefferson County KY and I made contact with another operator in Portland Oregon in the high end of ten meter band and I was shocked. I'm not sure but FM is a pretty wide signal and the stronger you modulate the more side bands you make.
 
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fm is used locally here by a few,, but not as a standard but as a lets do something different deal,,,,as for the channel 9/19 deal,,,, channel 9 here in central florida is the spanish superbowl channel,, just like channel 6 but in spanish,,,, but i like the idea of fm added as a mode but go for it being maybe 20 "channels" above 40 or 20 "channels below channel 1,,,
 
We talk FM sometimes just to mess around and try something different. It's actually kinda cool and works great. Really heats the radio and/or amp up fast though since it's all carrier power. I always run a fan or fans when we do this.
 
Or just frequency and amplitude modulate at the same time! Old keydown trick.
I think President is just trying to save some $$. But the FCC no longer has a reason to reject it.
I heard few...very few...good sounding FM stations over the years.
 
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oh and to add,,,,,when skip conditions get where it is a loud roar go fm and check out the channels, you will find a lot of european fm stations fading in and out,,,,they broadcasting at the same time causes a roar here in the usa on am mode,,,
 
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midnight special said:
oh and to add,,,,,when skip conditions get where it is a loud roar go fm and check out the channels, you will find a lot of european fm stations fading in and out,,,,they broadcasting at the same time causes a roar here in the usa on am mode,,,
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That roar you hear has nothing to do with Europeans on FM. It is the result of a couple million mostly AM signals mixed with a few SSB and a handful of FM signals. IOW it is simply chaos caused by all the signals. That roar was present long before FM came into use in Europe or anywhere else.
 
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Captain Kilowatt said:
That roar you hear has nothing to do with Europeans on FM. It is the result of a couple million mostly AM signals mixed with a few SSB and a handful of FM signals. IOW it is simply chaos caused by all the signals. That roar was present long before FM came into use in Europe or anywhere else.
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Hmmmm, I thought that ROAR was a Sky Blender.
 
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LOL sky blender I like that :)

Regarding FM.. half the radios in use probably have it now.
I have heard FM conversations but they are exceedingly rare.
I don't think FM would be embraced even if it was legal.

They should just allow it because, IMHO, nobody will care anyway.
 
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It is used in ham radio quite a bit. On ten meters is legal to use any place the word "Phone" is used. Although people near your frequency will complain. But Hams have customs they follow with very little variance.
Below 10 MHz is LSB phone and above is USB. Some still use AM in the lower bands and they are not popular types. Arrogant, abusive, and not very well educated.
Amateur%20Radio%20Allocations%20Apr%202017.jpg
 
Martian said:
What I am getting at is that most CB radio users are more interested in "loud" and "swing" and they wont get that with FM.
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If you want loud turn up your audio gain, Clear you get because that is the nature of the signal and modulation. When talking to Portland OR I heard every word clearly like he was next door.
Here is an AM signal with noise:
th

FM is resistant to this type of noise because all of these noises are AM in nature.
The FM signal is still in there because the noise does not change the frequency.
When FM is Demodulated the signal is clipped top and bottom and the varying frequency is obtained
by a circuit that converts the signal back to audio.

https://www.radio-electronics.com/i...eption/fm-demodulation-detection-overview.php
fm01.gif
 
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