[Elecraft] SSB transmit audio - Where's the punch?

[Jim Brown]

  On 10/5/2010 2:09 PM, Lu Romero wrote:
> First, the DX4 is a "close talking" microphone.  You have to
> almost eat it for it to work right.  The CM-500'ds Electret
> capsule has a pronounced proximity effect.  You HAVE to keep
> it AT LEAST an inch from your mouth or it sounds mushy and
> bassy.  This, combined with its omnidirectional response and
> the need to run mic gain relatively high to command good
> peak to average ratios from the K3 processor, cause "much"
> room noise (not a lot really, but Im picky) to find its way
> to the transmitter.

The CM500 is NOT an omni-directional mic -- you've noted that it has 
proximity effect, and that's BECAUSE it is a cardioid (directional) mic. 
As to the proximity effect -- you can compensate that the same way that 
virtually ALL vocal mics are compensated within the mic -- with 
additional low end rolloff.

73, Jim K9YC