[Elecraft] K3 Audio

[Jim Brown]

On 10/18/2017 9:03 PM, Don Wilhelm wrote:
> The voice audio needs some information in the 300 to 400 Hz region for 
> clarity, so the LO CUT must be set in the 200 to 400 Hz range to keep 
> intelligibility. 

I disagree. Audio below about 400 Hz makes VERY little contribution to 
speech intelligibility. The 1 kHz, 2 kHz, and 4 kHz octave bands are 
where the action is. Sound below 400 Hz provides "body" to the voice and 
"thickens" it. It can more pleasing to listen to, but it also burns 
transmitter power. So if the goal is communications, power is better 
devoted to those higher bands.

73, Jim K9YC