[Elecraft] Microphone Upgrade

[Jim Brown]

On Mon, 15 Dec 2008 12:26:22 -0500, Paul Christensen wrote:

>the 664 are also great choices for the K3.

>As is the EV 635A and they're plentiful on the used market.

The 635A is an omnidirectional mic (picks up equally well from all 
directions). It would sound great in a quiet shack, but has no 
directivity to reject background noise. 

On the other hand, noise can also be rejected by working the mic 
very close to the mouth (like eating it). That way, the desired 
sound is much louder than the noise because of inverse square law 
(sound dies out by 6 dB for a doubling of the distance). 

73,

Jim K9YC