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Keying Relay - AWA, Radio Transmitter, circa 1914 Object Reg. No: ST 015472

Keying Relay made by Amalgamated Wireless (Australasia) Ltd for a radio transmitter, circa 1914.

The relay is a safety device isolates the operator's morse key from the high voltage needed to operate the transmitter. The hand operated morse key switches the current through the coils on and off; activating the armature of the relay, thereby switching the high voltage (safely) to the transmitter.
Two solenoid coils mounted on wooden base with adjustable armature mechanism and terminals. Every major component has a letter on it.
Statement Of Significance:
The equipment is typical of early shipboard radio in the period prior to the First World War (1914 - 1918); it is rare.
Discipline: Technology
Dimensions: 130 mm (Height), 160 mm (Width), 185 mm (Length)

More information

Tagged with: telegraphy, radio transmitting equipment
Themes this item is part of: Information & Communication Collection, Early radio: transmission and reception, 1900 - 1914
Primary Classification: COMMUNICATIONS
Secondary Classification: Radio
Tertiary Classification: transmitters
Inscriptions: Metal plate on one side of wooden base: AMALGAMATED WIRELESS (AUSTRALASIA) LTD / MARCONI TELEFUNKEN SYSTEM / SYDNEY. NSW. No 97/313
Stamped into same side of wooden base: TESTED 07-A
Metal plate on other side of wooden base: AUSTRALIAN MANUFACTURE
Brass plate on top of box: ALTERNATOR
Brass plate on top of box: TRANSFORMER
Brass plate on top of box: CONDENSER
Brass plate on top of box: FUSE
Brass plate on top of box: 2 KEY 1
Component letters: A(magnetic part of armature) / E(both coils) / F(mounting block) / C(top contact) / K(bottom contact) / N(contact support) / R(adjuster support) S(adjuster screw) / J(contact carrying part of armature)
Manufacturer: Amalgamated Wireless (Australasia) Ltd (AWA), Sydney, New South Wales, Australia, circa 1914

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