The No. 11 Wireless Set was a wireless radio transceiver

Transceiver

A transceiver is a device comprising both a transmitter and a receiver which are combined and share common circuitry or a single housing. When no circuitry is common between transmit and receive functions, the device is a transmitter-receiver. The term originated in the early 1920s...

 used by the British Army

British Army

The British Army is the land warfare branch of Her Majesty's Armed Forces in the United Kingdom. It came into being with the unification of the Kingdom of England and Scotland into the Kingdom of Great Britain in 1707. The new British Army incorporated Regiments that had already existed in England...

 during World War II.

History

The No. 11 Set was designed in 1938 to replace the 1933 No. 1 Wireless Set. Originally intended for tank

Tank

A tank is a tracked, armoured fighting vehicle designed for front-line combat which combines operational mobility, tactical offensive, and defensive capabilities...

s, it was used for ground communications of the British Army for the early part of World War II. It was used by the Long Range Desert Group

Long Range Desert Group

The Long Range Desert Group was a reconnaissance and raiding unit of the British Army during the Second World War. The commander of the German Afrika Corps, Field Marshal Erwin Rommel, admitted that the LRDG "caused us more damage than any other British unit of equal strength".Originally called...

, and also by the Germans

German Army

The German Army is the land component of the armed forces of the Federal Republic of Germany. Following the disbanding of the Wehrmacht after World War II, it was re-established in 1955 as the Bundesheer, part of the newly formed West German Bundeswehr along with the Navy and the Air Force...

, who captured several sets in France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

. The No. 11 Set introduced the combination of transmitter and receiver circuits into a single unit with a single tuning control to simplify netting. It also had the capacity for remote-control from up to 400 m (437.4 yd) and a remote aerial at up to 10 metres, making it a harder target and more convenient to use.

Specifications

Power from batteries or low- or high- power (6V or 12V) supply units gave outputs of 0.6W to 4.5W and ranges between 3 and 20 miles with the use of 6 ft or 9 ft aerials. The set itself, 8.5 x 19.5 x 12 inches, weighs 43 lb; the complete Low and High Power stations weigh 180 and 216 lb.