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Title: carbon mike substitute Post by: PA0NVD on February 03, 2019, 10:20:46 AM I have quite a few sets that require a carbon mike, and it isn't always easy to get one that sounds good. Therefore I made a small circuit that substitutes a carbon mike and really sounds great. I also use it with the Phillips SFZ 395 transmitter and get fine sound reports.
The circuit starts working at a few volts only. At 4 1/2 - 6 volts and a microphone transformer (quite common) the output can be upto 80 V pp depending upon the transformer and talking close, so plenty of output. Title: Re: carbon mike substitute Post by: PA0NVD on February 03, 2019, 12:59:54 PM a pic
Title: Re: carbon mike substitute Post by: Opcom on February 03, 2019, 11:45:07 PM That looks pretty good. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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