Drake TR-7 radios use A3H which is carrier plus upper sideband.

Larry  K2LT

Larry W8ER wrote:
> Jim,
>
> It's interesting that it has found commercial use .. especially as effective 
> as in TV. I would believe that you are talking about the video.
>
> I have been experimenting with AM a bit. I have found that even with 
> traditional AM, I could drop the level of the carrier a wee bit and no one 
> has metioned anything other than it sounds great! I expect that there is a 
> point where I would get reports of distortion but with the AM carrier level 
> dropped to 85 percent now, that has not happened. I am using a device that 
> purposely outputs symetrical audio because I don't want asymetrical audio 
> affecting the results.
>
> Getting rid of one sideband would really be interesting. I do it on receive 
> with spectacular results, especially when there is QRM present but doing it 
> on transmit would require some code changes. Thanks for the info.
>
> --Larry W8ER
>   


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