Transmitter Reciever TR9D

[arnaud]

Found on a Fairey Battle shot down in 1940 this Transmitter receiver type TR9D Ref n° 10A/104870 (serial n° 6223)

Does anyone has more informations and photographies about that item?

Thank you very much...

[Andy Saunders]

Arnaud

This is the standard wirelesss transmitter/reciever in use in RAF aircraft of this period.

Not sure what else you need to know?

The TR9D also fitted in the Hurricane, Spitfire, Defiant etc. I think they also went into bomber aircraft of the period. Not sure, but think they were TR9G...I'd have to check, as my memory is probably faulty.

[arnaud]

Thank you Andy,

In fact I have just half of it and some empty boxes! Transmitter receiver is a interesting item. I'm looking for some photographs inside and outside... The one I have come from a Fairey Battle shot down on May 14th 1940 and is a "TR9D"...

A technical book would be amazing...

Bye

[Andy Saunders]

Arnaud

You are more likely to get details or copies of the technical books or AP's (Air Publications) here:

http://forum.keypublishing.com/index.php

Meanwhile, the TR9D is listed in AP1186 as being from single seater aircraft. (Transmitter: the 10D/10472 and reciever: the 10D/10471) The TR9D itself should be 10D/10470. It should not be 10A. If it is 10A, then I can only think this to be a variation of the 10D which (might!) be related to the Battle, perhaps?

For multi-seat aircraft (I would have thought thats the Battle, too?) it would have been the TR9F with the R1139 and T1138.

Night Fighters: TR9G
Bombers: TR9H
Coastal: TR9J
Gliders etc: TR9K

Hope this helps a little?

[MarkRS]

Arnaud,
This site has pictures of what the transmitter and receiver should look like:
http://www.binbrook.demon.co.uk/html/Fairey_Battle.html
Note that they are designated: R1082 and T1083.

Mark

[Pieter H]

Hi Arnaud,

It is quite surprising you found a TR9D in a Battle!
By early 1940 there were essentially the following radio sets in RAF aircraft:

• TRF (R1082 + T1083) used in all light and medium bombers (=all RAF bombers including the Battle). Operated in the 111kHz to 15 MHz bands.
• TR9D (R1120 + T1119) which was used in early Hurricane and Spitfire fighters. Operated at 4.3-6.6 MHz. Plus a TR9J version used by Coastal Command.
• TR1133 (R1137 + T1136) introduced end 1939 for Hurricane & Spitfire fighters. Operated 100-120 MHz.

The web site forwarded by Mark shows the correct R1082/T1083 as used in Battles. The only explanation for a TR9D inside a Battle is that creative ground crew on a mixed Hurricane-Battle airfield mounted a Hurricane radio inside a Battle. Note that performance of all these radio sets was bad, only in June a much improved rasdio was introduced.

Regards, Pieter

[Andy Saunders]

As Pieter says, and as I aluded to, I am surprised you have found a TR9D in a Fairey Battle.

The other odd thing is the 10A/104870 number (I think that should be 10D, perhaps?) Are you sure it is not 10470 - no 8 between the 4 and 7.

[SteveB]

I dip my toe in this with trepidation but, after the introduction of VHF by the RAF, Army Co-operation aircraft used the TR9 to communicate with the Army? Might this give a clue?

Steve

[arnaud]

Thank you to all,

I could just confirm you that this TR9D 10A/10470 n° 6223 was found on a Fairey Battle shot down on May 14th 1940 (all details in my next book "Le piège de Sedan"): not one doubt Merlin Engine, radiator and serial number found on this crash site.

Remarks from Steve are very interesting...

Bye

Arnaud

[arnaud]

Andy wrote :
"The other odd thing is the 10A/104870 number (I think that should be 10D, perhaps?) Are you sure it is not 10470 - no 8 between the 4 and 7."

Andy, you are half right:
This is indeed a ref No. 10A/10470 : I am very impressed about your knowledge...

If anyone have any explanation about that TR9D found in a Battle like Steve...