Wireless FM Microphone (CB14944E)

Details
Written by: Newton C. Braga

 

We found this circuit in a 1979 Poptronics. The coil is formed by 5 turns of wire 28 in an adjustable 0.5 cm ferrite core and the antenna is 12 to 30 cm long. The microphone must be piezoelectric, and the capacitors are ceramic.

 

 


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