Vertex Airband Plug
01 November 2015
Ground.
Common Ground
Speakers
Output Impedence 1Kohm.
Mic
Carbon Replacement.
This pin provides around 5VDC via a 150R resistor and expects an audio level of around 200mV for full AM modulation.
Dynamic or Electret Mics will need amplifying by an external amp to around 200mV nominal.
eg. Dynamic Amp Gain around 20x, Electret Mic Gain around 6x
PTT
Ground to Transmit.
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