Transmitter Reciever TR9D

[Observer1940]

Originally Posted by Pieter H

Arnaud, all,


Trying to reduce the confusion a bit, let me again summarize the different radio sets as used by the RAF by May 1940.

• Around May new fighter a/c were started to be equiped with the much better TR1133 set. I expect that not many units in France already used this radio, probably only home based Fighter Command a/c.

So yes, from that perspective I'm still surprised you've found a Battle with a TR9D. The question is whether it still contained the standard TRF, with an additional TR9D, or had the first one replace with a TR9D. The best explanation is that Battle pilots valued a/c to a/c communication more than communication back to base, and installed the standard fighter equipment.

Regards, Pieter

(Extract quote from posting)

Hello All

I agree with Andy regarding fighter aircraft using the TR 9D, even the quote I used about the new VHF set being introduced in a very limited way in August 1940, looks over optimistic and as it states the TR 9D was still in use by Fighter Squadrons throughout the Battle of Britain.

There is proof to back up the fact that the new VHF set was not in use by Fighters in August 1940, as the Accident Card for Hurricane P3684 which crashed after hitting a balloon cable on the 19th August 1940 states in part:-

"Did not receive order to alter course. In view of proximity of balloon barrage to drome a/c will be kept above balloon ht until over base. Introduction of V.H.F in near future will ensure that correct signals are received (OC)"

Therefore, the new VHF set was still not in use by fighters.

Even the quote I used about the new TR 1133 VHF set, starting to be introduced in August 1940 now looks over optimistic and incorrect.

Mark