[Elecraft] K3 and W2IHY EQ Plus!

[Jim Brown]

On Tue, 26 Jan 2010 10:59:23 -0800, Lyle Johnson wrote:

>In general, I suggest using "cuts" rather than "boosts" to shape the 
>passband, unless the range of the cuts are insufficient to achieve the 
>shaping you desire.  I apply this approach to Rx as well as Tx EQ.

Yes. In general, it is good audio practice to get rid of as much as 
possible of the frequency spectrum that is not part of what you're 
trying to use. In this case, that means maximum cut of at least the two 
lowest octave bands. Depending on the response of the microphone, it's 
possible that the third and even the fourth bands should be cut. 

The best way to home in on settings is to have a good listener tune you 
in on a receiver set for wide RX bandwidth (at least 2.7kHz), make those 
cuts, and tell you when you have gone too far. What settings are 
"right," particularly in the higher octave bands, should be made in this 
way. And when you're deciding, remember that transmit speech below about 
400 Hz burns transmit power while making almost no contribution to 
speech intelligibilty. The octaves between 100 Hz and 400 Hz add "body" 
to your voice, but that's all. If you're ragchewing, you may want that. 
If you're chasing DX, contesting, or running QRP, you don't. 

73,

Jim Brown K9YC