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Courier mic wiring

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Unit243

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Dec 31, 2013
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Cambridge Ontario Canada
I have a couple of wires off of my Courier BTM-4 desk mic for my Courier Centurion , I rigged up a quick wire dipole antenna and keyed it up but no audio , I unscrewed the shield cover to reveal the white wire is off ... there are 3 wires that I can see , a white , red, and ground.. is there a black in there too ? and where do these wires hook up to ?
 

Dawn

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Apr 5, 2003
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Pinecrest,Fl
I don't have an original mic, but the pinout on the stock mic and 1/4" stereo type phone plug should be the tip is the audio and probably white. First ring is PTT and probably red. Shank ring should be ground and most likely black. If there is a shield, it's connected to this too. The centurion is 3 wire relay switched, so their should be no need for audio switching or a spdt pair on the ptt/audio contacts.

The mic according to the schematic is not switched from open to closed during transmit although it shows a switch contact on the stock mic, the pins are jumped, therefore direct. This is for the PLL40, but should be exactly the same as the 23 channel centurions and the 40D since they all used the same mic wiring.

I have no schematic for their power mic, but it would be exactly the same.
 

Dawn

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I just caught your profile and noticed you're hailing from the north and new here. Welcome aboard.

You didn't mention if yours is the 23 channel model or the latter 40PLL & 40D.

Have a happy new year as well.
 

Unit243

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Dec 31, 2013
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Location
Cambridge Ontario Canada
I just caught your profile and noticed you're hailing from the north and new here. Welcome aboard.

You didn't mention if yours is the 23 channel model or the latter 40PLL & 40D.

Have a happy new year as well.
Yes I am haha , thankyou very much and a happy new year to you and yours ! it's just a 23 channel, I'm thinking of using it as a conversation peice that or sell it outright but I'de like to have it working .because I know when I get a setup running I'm gonna have the mashed potatos but missing the roast beef and gravy so to say because I'll be missing the other and extra channels.
 
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