[Elecraft] K3/K2 - Microphone Question

[Jim Brown]

On Sun, 26 Jul 2009 21:51:23 -0700 (PDT), Lee Buller wrote:

>Just came into possession of an ElectroVoice PL91 microphone.  The 
specs says it has 150 ohm impedance.  I think that the K3 would like 
to have 600 ohms.  I would imagine that this could be used on the K3 
if you used an impedance transformer.  Comments?

NO TRANSFORMER REQUIRED. The K3 designers do not understand audio. 
It will work just fine. Just wire it properly, following the diagram 
in 

http://audiosystemsgroup.com/HamInterfacing.pdf

The only shortcoming of this mic is proximity effect -- extreme bass 
boost when it is very close to the sound source. To correct for 
that, you will want to tweak the TXEQ on the K3 to roll off the 
bottom three bands to their maximum, and boost the top two EQ bands.   

73,

Jim K9YC