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Vibrator - Bland Radio, Type BR50C, circa 1950 Object Reg. No: ST 035820

Summary:
Bland vibrator used for radios designed to run from a DC supply.

Vibrators are used to change DC into AC which is then be stepped up by a transformer to the voltage required by the radio. The AC output is then turned back to DC to operate the radio, which is done either by a thermionic rectifier or a second set of contacts in the vibrator. A vibrator with two sets of contacts is called a synchronous type. The BR50C is a split-reed synchronous type. A split-read vibrator allows the negative side of the output to be isolated from earth. A non-synchronous type requires the use of a separate rectifier.

Synchronous vibrators tend to be quite noisy electrically and require more filtering. Both types were somewhat noisy mechanically; they hum.
Description:
Large metal can containing another metal cylinder with seven pin base.
Acquisition Information:
Donation from Mrs Kennedy, 1984
Discipline: Technology
Dimensions: 96 mm (Length), 52 mm (Diameter)

More information

Tagged with: radios, electronic vibrators
Themes this item is part of: Information & Communication Collection
Primary Classification: COMMUNICATIONS
Secondary Classification: Radio
Tertiary Classification: components
Inscriptions: Paper label: VIBRATOR TYPE BR 50C / (Patent Applied For) / ONLY OBTAINABLE FROM / BLAND RADIO LTD / Coromandel Place / ADELAIDE
Manufacturer: Bland Radio Ltd, circa 1950

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