Some heavy reading
https://history.army.mil/html/books/..._Pub_10-18.pdf
Another one for bed time.
THE STORY OF 7 SIGNAL REGIMENT Had a quick look at this book or document or whatever it is. I spotted some bad errors in the types of equipment the authors have noted as being issued to this unit in the M.E. during 1941, such as a late WW2 British airborne receiver the R109 , I believe the authors have confused this receiver with the Aust. W.S. 109 which was in use in the M.E. during 1941.
https://s3-ap-southeast-2.amazonaws....nt/7460301.PDF
The authors of this unit history have made little effort in researching the wireless equipment - they include a pic of a post-war Eddystone receiver that was built from the early 1950s to the late 1960s and used by hams, fishermen, govt. departments and more. The pic is supposed to depict a receiver as used by the 7 Sig Regiment in the Middle East in 1941.
Eddystone history
http://www.radiomanual.info/schemi/S...war_models.pdf