The Chindits were using Australian made Fs6 sets . I didn't know this but I did know that AWA had a contract for the FS6 set to supply to India.
https://www.chinditslongcloth1943.com/did-you-know.html
"Communication between Rear Base at Agartala and the columns in the field was achieved using the RAF 1082/88 Wireless set. These sets were the standard wireless set of the Blenheim Bomber in WW2 and they gave the Chindits approximately 800 miles in range. For communication between columns whilst in Burma, the FS.6 radio set was used and was deemed a valuable piece of equipment. However, the type 21 radio sets used locally between platoons, proved to be next to useless. All code/cipher systems on Operation Longcloth were standard RAF 'one-time pads"