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Motorola Desk Mic Restoration

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AerialEars

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Joined
Feb 3, 2005
Messages
85
I have a Motorola desk mic, model TMN6017A. I'd like to get it usable and rewire it for my Kenwood TS-570. The mic element has E-4 stamped on back of it. I'm going to wire the PTT circuit to a couple of terminals on the transmit button that connect when the button is pressed.

Will this mic element work with the TS-570?

If not, can you suggest a mic element that would work and fit in the mic head?

Thanks in advance for your assistance and suggestions!
 
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EWC_BDN

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Apr 25, 2017
Messages
159
I'm pretty sure that is a dynamic mic. So it wouldn't work. what i would do is just take all the guts out of a kenwood mic and put them in the Motorola mic.
 

prcguy

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Most Motorola mics, especially that vintage are designed to feed a carbon mic input. That mic is probably from the 1960s Motrac era and is probably a dynamic element with preamp circuitry that uses a bias voltage to feed the equivalent of a carbon mic input in the radio.

The TS-570 takes a dynamic mic and bypassing all the preamp stuff in the Motorola mic might work. Some radios also have a secondary mic input compatible with electret condenser mics and if the 570 has that feature it might work with the stock Motorola mic.
 

cmdrwill

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Some of those did have a dynamic mic element and the amplifier was in the base of the mic stand.
 
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