[Elecraft] Wiring the Shure 450 mic for K3

[Iain MacDonnell - N6ML]

Hmm, but there has been a recommendation to connect the mic return
and shield to the connector chassis, instead of using pin 7, to avoid
the "pin 1 problem".

http://n2.nabble.com/Microphone-ground-td1329465.html

     ~Iain



Don Wilhelm wrote:
> 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?
>>
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