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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
