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PA to microphone wiring

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wb6sub

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I have a Motorola microphone with the push to talk with a XLR 3 pin connector that I want to interface with my pa system that has a keyline for the push to talk and a separate audio input for the microphone. Any ideas? I hooked it up and played with it and just don't really know what I am doing. Any ideas what I got to do to make it work or do I need to purchase a special interface card.
 
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wb6sub

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no on photo I am trying to make any microphone work with this amp. The amp has a push to talk key and transmit audio line with not really sure what will work with the amp since every microphone I have used just doesn't want to play with it.
 
prcguy

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What make/model is the PA amp? Usually they are running all the time and the PTT is in line with the mic audio to turn the mic on and off. Modern PA amps also take low impedance mics from about 200 ohms to maybe 1k ohm being a good range.

If you stick your finger in the + pin of the XLR can you get any buzz or hum?
prcguy


wb6sub said:
no on photo I am trying to make any microphone work with this amp. The amp has a push to talk key and transmit audio line with not really sure what will work with the amp since every microphone I have used just doesn't want to play with it.
Click to expand...
 
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wb6sub

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I will find out if I can I will pull it out and see if i can find any info. I am a little lost when it comes to audio on balanced and unbalanced audio. I have forgotten alot since the military et school
 
krokus

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wb6sub said:
I will find out if I can I will pull it out and see if i can find any info. I am a little lost when it comes to audio on balanced and unbalanced audio. I have forgotten alot since the military et school
Click to expand...

Did the bubblehead ET A school cover much of balanced audio lines? As a skimmer, I was mostly covering unbalanced lines.

Sent via Tapatalk
 
prcguy

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For a test just hold the XLR connector with something insulated like a piece of paper, then touch each connection in the XLR with a paper clip and see if the PA makes any hum with the volume up a little. For reference, the XLR pin 2 is audio +, pin 3 is audio - and pin 1 is the shield. If the PA was made before the 1970s it might use a different wiring.
prcguy


wb6sub said:
I will find out if I can I will pull it out and see if i can find any info. I am a little lost when it comes to audio on balanced and unbalanced audio. I have forgotten alot since the military et school
Click to expand...
 
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jackj

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Is it inside?

wb6sub said:
No it doesn't have any circuitry inside I opened it up to check it out. It only has a press to talk and a mic
Click to expand...
Some of the newer (last 30 yrs) Motorola mics have the audio preamp inside the mic element. They will usually have either a red dot or a plus (+) sign next to one of the contacts. But I've never seen a moble mic with a XLR connector, usually a 4 pin or more connector. The PTT leads are separate from the audio.
 
SteveC0625

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wb6sub said:
I have a Motorola microphone with the push to talk with a XLR 3 pin connector that I want to interface with my pa system that has a keyline for the push to talk and a separate audio input for the microphone. Any ideas? I hooked it up and played with it and just don't really know what I am doing. Any ideas what I got to do to make it work or do I need to purchase a special interface card.
Click to expand...
Several others have hinted or asked that you provide some concrete information. One even asked nicely for a picture.

So....

Please post a pic of the mic and connector ***AND*** the Motorola part number or model number that should be on the case some where. Motorola makes or made hundreds of different microphones for mobiles, portables, and base stations. We can't begin to give you a useful answer without knowing which mic you have.

Please give us some useful information about the amplifier as requested. Make, model number, and power rating for starters would be helpful.

If you really want some help with this, you have to give us enough concrete information to figure out how to make your project work.
 
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wb6sub

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like I said it has been a long time since a or c school and don't have a lot of experience in my career with audio amps or mikes. But will get further info on the amp if I can.
 
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