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Quartz Crystal - Unknown Manufacturer, 1950-1959 Object Reg. No: HT 26141

Summary:
This is a vacuum mounted quartz crystal. It would have been used to control the frequency of a transmitter.
Description:
Shouldered glass bulb mounted on a four pin UX style base.
Discipline: Technology
Dimensions: 115 mm (Height), 45 mm (Diameter)

More information

Tagged with: transmitters
Themes this item is part of: Information & Communication Collection
Primary Classification: ELECTRONICS
Secondary Classification: Vacuum Technology
Tertiary Classification: frequency control
Inscriptions: On metal inside bulb: " 5R2241/2 / 630 KC "
On base: " LICENSED ONLY TO EXTENT / INDICATED ON CARTON/1 over 4 (excise mark) "

Accompanying note:
COMMUNICATIONS
Crystal, vacuum packed, in valve envelope, 630 kHz probably 1950s
Manufacturer (Possible): Amalgamated Wireless (Australasia) Ltd (AWA), Australia, 1950-1959

The excise mark (1 over 4) belongs to AWA

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