Summary
This is a vacuum mounted quartz crystal. It would have been used to control the frequency of a transmitter.
Physical Description
Shouldered glass bulb mounted on a four pin UX style base.
More Information
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Collecting Areas
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Manufacturer (Possible)
Amalgamated Wireless (Australasia) Ltd (AWA), Australia, 1950-1959
The excise mark (1 over 4) belongs to AWA -
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
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Classification
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Category
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Discipline
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Type of item
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Overall Dimensions
115 mm (Height), 45 mm (Outside Diameter)
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Keywords