This headset is designed and manufactured in the UK primarily for the aviation sector such as the RAF, air traffic control etc. The Airlite 62 is available in many options dependant on customer specification.
The headset I have is monaural, 300 ohm microphone, fitted with RAF style plug without an in-line PTT switch.
To use it with the TS-850 the fitted RAF plug was removed and an 8 pin plug fitted. The new plug is wired using only the microphone signal and ground wires and the chassis ground wire. I then connected the headphone wires to a 6.5mm mono jack plug.
The PTT switch I use with the headset is connected via a cable to the “remote” socket on the rear of the Kenwood TS-850. This configuration allows me to use either the headset or my boom mike with the single ptt switch.
In addition, I could also use the built in VOX system or the receive/send switch on the radio.