[Elecraft] ElectroVoice 664 mic to K3?

[Jim Brown]

On Wed, 11 Feb 2009 11:51:24 -0200, TMorton wrote:

>I have a EV664 Dynamic Cardioid mic which I used with Orion II thru a 
>W2IHY box. The 664 has a four pin XLR plug from its' base.

The EV 664 is the grandfather to the RE16 that I use, and is an excellent 
choice for ham radio. You should feed the 664 directly into the K3. Use the 
wiring in the Ham Interfacing link I just posted, and also the same TXEQ 
settings. 

With respect to wiring -- see page 47 of the tutorial, and note that pin 
numbers are shown for the Standard 3-pin XLR connector wiring used in pro 
audio. If your mic has a 4-pin XLR the wiring will be different. By the way 
-- the 4-pin XLR is NOT a Standard for audio anywhere in the world. 

You can find the mic wires by probing between the connector pins with an 
ohmmeter. The mic capsule (the two balanced wires) will measure as some low 
resistance value on the order of 50 ohms, AND you will hear a click if you 
put your ear close to the mic. 

I'm looking at the original data sheet for a 664. It has both high 
impedance and low impedance outputs. You want the LOW impedance output for 
the K3. For the connector that is built into the mic, pin 1 is shield, pin 
3 and 4 are the balanced low impedance outputs. 

The 664 has some built-in equalization that boosts the highs an bit and 
rolls off the lows a bit. For that reason, you don't need quite as much 
TXEQ as for the RE16 that I'm using. For the 664, I would use about 3dB 
less cut at 50, 100, and 200 Hz, no EQ at 400 Hz, no boost at 2.4 kHz and 
about 5 dB boost at 3.2 kHz. 

73,

Jim Brown K9YC