MGL Avionics User Forum

G'day,

i want o use a hand-held microphone with my V16 transceiver.

This requires that the tip connection of the microphone socket be connected to the PTT line from the transceiver.

However, there's is no connection shown in the V16 wiring diagram.

My questions: Can I connect the pilot's PTT pin (14) to the tip of the pilot's microphone socket?

Also, can I connect the co-pilot's PTT pin (16) to the tip of the co-pilot's microphone socket?

I will be using a transmit switch on the control column as well.


TIA.


Cheers...........Geoff

You can connect any switch to ground regardless of where that switch is located. It is common to use the tip on handheld mics as well as some headsets with a built in PTT button.
Make sure your microphone is a electret type - dynamic microphones will not work unless you use a suitable pre-amp.

The input impedance of the V16 microphone circuit is about 200 ohms for A/C signals (audio) as required by certification standards - electret microphones need an impedance converter - usually a small transistor based amplifier needed to drive the low impedance of the radio input. This is located inside your headset usually were the boom goes into the cup. Power is supplied from the V16 via the micrphone lead - 8VDC.