[Elecraft] Wiring the Shure 450 mic for K3

[Don Wilhelm]

Benson,

You can connect the black wire to either pin 7 or pin 8 and the red wire 
to pin 2 and it will work with the K3.  Other amateur transceivers (some 
Kenwoods) have the PTT  return separate from the AF return.  I believe 
the PTT return is pin 8 and the AF Return is pin 7, so if you also want 
it to operate with all Kenwood transceivers having the 8 pin connector, 
wire the black wire to pin 8 and the shield plus the white wire pin 7 - 
the green wire (AF) goes to pin 1.

73,
Don W3FPR

Benson wrote:
> I see in the K3 manual that the mic connector has one pin for PTT and 
> two grounds. My mic, a Shure 450 
> (http://www.shure.com/stellent/groups/public/@gms_gmi_web_ug/documents/web_resource/us_pro_450_series_2_ug.pdf) 
> has a red and black wire for PTT. They are not part of the audio 
> circuit but are just shorted by the PTT in the mic. Can anyone offer 
> any guidance in wiring this mic?
>