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

Summary:
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.
Description:
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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