One of our club members, Ralph VK3LL published an article in the early '90s describing a hands fee mobile unit.
The need for hand free microphone operation, is even greater now with more of our members installing AR transceivers in their vehicles. Ralph VK3LL has come to the rescue with an updated design now featuring a PIC microcontroller with PCB, that has made the project simpler to build.
Why go Hands Free
Keep both hands on the steering wheel whilst operating your radio transceiver.
Improved TX audio
The electret microphone is at a constant distance from the user’s mouth and tailored for optimum frequency response within your particular vehicle
No more curly cord
A tiny (8mm x 15mm) microphone can be discreetly installed to provide a neat and tidy installation – XYL approved
Features that have been designed into the Hands Free kit.
Adjustable microphone gain control
Adjustable bass and treble audio equalisation
All adjustments are made using 25-turn trim-pots for fine ‘tweaking’