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VC-25 Vertex Standard VOX Headset

Vertex Standard
VOX Headset (Voice Operated Transmit)
Hands Free VOX Operation or Manual PTT keying
With Gain Control and Mode Switch


VX-10 VX-160 VX-180 VX-210 VX-210A VX-300 VX-400
VX-414 VX-417 VX-410 VX-424 VX-427 VX-420 VXF-10
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VC-25 VOX Headset (Light Duty)
$ Qty

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VC-25 Operating Instructions

The Vertex Standard VC-25 plugs into most hand-held transceiver speaker/microphone jacks, and does not require external VOX circuitry to operate, since it is built-in. The in-line control module permits adjusting VOX gain, and also permits manual PTT operation. The lightweight headset contains a foam-padded speaker for comfortable listening, and the earpiece/boom mic. can be adapted for left- or right-sided operation.
To use the VC-25, insert the plug into the MIC/EAR or MIC/SP jack of your hand-held transceiver. Clip the in-line module to a comfortable location on your clothing. Put on the headset, and gently adjust the flexible boom microphone so that the foam-covered mic. element is about 2-4cm from your mouth. Adjust the length of the metal rail so the headset speaker is centered over one ear, and the "T" shaped pad rests just above the other. Slide the 2-position switch (3) to the VOX position, then speak in a natural voice, and adjust the GAIN control (2) so that the transmitter is activated. Experiment with the gain control to find an optimum setting so only your voice activates the transmitter, but not background noise. You may need to adjust this setting for different operating locations (when outdoors, for example).
For normal PTT operation, slide the switch to the PTT position, and press the PTT switch (1) located just above to activate the transmitter.


VC-25 Control Module Vertex Standard


  • Before inserting the plug into the jack on the transceiver, turn the POWER switch on the transceiver to "OFF". If the plug is inserted while the POWER switch is "ON", the VC-25 will not be activated.

  • When transmitter is activated with the receiving audio signal, adjust the VOX GAIN control on the VC-25 or VOL control on the transceiver to obtain the optimum setting, so that only your voice activates the transmitter.



  • Maximum Audio Output Level: 30mW
  • Impedance: 32 ohms
  • Cord Length: 1.6 Meters (63 inches)
  • Supply Voltage: 2 ~ 10 VDC
  • Current Consumption : 1.5mA (MAX)
  • VOX Sensitivity: 3mV rms (gain control MAX)
                             10mV rms (gain control MIN)