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G3TSO
Hands Free Mobile Mic
FT817 with Mic box
Inside the Mic Box
FT817 with Mic box
FT817 with Mic box
1/5
2003
Hands Free Mobile Mic
This unit comprises a switch box to control the radio and provides an interface between different radios and microphones.
The original idea was to use an electret microphone and earpiece assembly readily available for mobile phones. I later discovered a cheap headset with an ideal microphone, but the rest of the assembly was rather flimsy. With VHF operation in mind the unit is equipped with a 1750 Hz tome-burst for repeater operation. A volume control was added to reduce vehicle noise pick-up. Details are provided for connection to a number of radios.
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