Press To Talk (PTT) or “PRESSEL” switch is usually mounted on one side of the microphone or in the middle of the handgrip of a telephone style handset. To operate correctly, you have to press it in order to switch the radio from receive mode to transmit mode and release it in order to revert to receive mode.

The symbol Tx (transmitting) or Rx (receiving) appears on the display during broadcast or reception.

Practice on VHF radio simulator

Press the PTT switch switch on the microphone handset to transmit (Tx) and release it to receive (Rx).


The PTT switch on the microphone handset

By pressing the PTT switch during a voice broadcast on VHF CH 16 the Tx/Rx indicator display changes as the PTT switch is pressed (Tx) and released (Rx).

Last modified: Friday, 13 November 2020, 3:50 PM