[Elecraft] RE50B microphone connected to K3

[Jim Brown]

On 2/4/2012 8:42 AM, David Moes wrote:
> E50b is a low z dynamic mic that is well suited to voice and is an
> excellent mic  should work well for K3.

Yes. An RE11 or RE16 is even better, because they are directional and 
reduce background noise pickup (fans, room noise, etc.)

>   To use this unbalanced you
> are correct to connect pin1 to pin3   (cold to ground)

Yes, Pin 3 to Pin 1 is right, but Pin 1 is the SHIELD, not "ground,"   
and Pin One must go to the SHIELDING ENCLOSURE (the chassis) to provide 
shielding and prevent "the Pin One Problem."  The distinction between 
"ground" which some interpret (wrongly) as a connection to the EARTH, 
and a connection to the SHIELDING ENCLOSURE is important -- no 
connection to the EARTH is needed to prevent noise or RFI issues.

> do not connect the XLR connector body to the ground it should be left floating.

Again, this word "ground" confuses the issue.  Inside the microphone, 
there MUST  be a connection between Pin One and the metal shell of the 
mic -- this provides shielding for the mic itself. AES Standards also 
call for a connection between Pine One and the shielding enclosure 
INSIDE EQUIPMENT, but require that there be NO connection between the 
cable shield and the cable shell.  There are very important reasons for 
this that don't matter here. :)

73, Jim Brown K9YC