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Quartz Crystal - Unknown Manufacturer, 1950-1959 Reg. No: HT 26141
- This is a vacuum mounted quartz crystal. It would have been used to control the frequency of a transmitter.
- Shouldered glass bulb mounted on a four pin UX style base.
|Dimensions:||115 mm (Height), 45 mm (Diameter)|
|Themes this item is part of:||Information & Communication Collection|
|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) "
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