Control Unit for Wireless Set No. 1

Control Unit for Wireless Set No. 1
	;
Production history
Introduced	1933
Specifications
Weight	7 lb (3.2 kg)
Length	10 1⁄8 in (25.7175 cm)
Width	4 1⁄4 in (10.795 cm)
Height	6 3⁄8 in (16.1925 cm)
Power supply	4.5V (3 x "X" dry cells)

The Control Unit for Wireless Set No. 1 was used to operate a Wireless Set No. 1 from a remote location via a line connection. It allows a user to operate the radio in either the voice (R/T) or Morse (C/W) mode as well as providing an intercommunication capability between the local and remote operators.^[1]

The unit has a local battery telephone set, a Morse key, a signalling/calling buzzer, a hand microphone and a receiving headset. To operate, two units are needed: a local unit that connects to the radio and a remote unit, also called the distant unit, for use by the operator at the remote location. The units can be separated by up to 200 yards and are connected by field cable (line).

Starting in 1935, as quantities allowed, the Control Unit for Wireless Set No. 1 was replaced with an improved version, the Wireless Remote Control Unit A.^[2]