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Combination Mic and Coax tester

DTB Radio

Well-Known Member
Sep 14, 2005
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Carlisle, PA. USA
www.dtbradio.com
Here's a handy circuit that I cooked up about 12 years ago for any of you who test alot of mics and coax. www.dtbradio.com/mictest.gif

You'll need to run the mic audio through an external audio monitor, but it works very well. I added an LED modulation monitor to the one I use. Just run the mic audio through a couple transistor amp stages to get it to clip pretty hard, and rectify it through a cap, LED, and resistor.
 

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