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Vibrator - MSP Oak, Type V4012, circa 1950 Object Reg. No: ST 035818

Summary:
M. S. P. vibrator, in original carton, used for car radios designed to run from 12 Volt 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 V4012 is a non-synchronous type. 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:
Metal cylinder with six pin base in original carton. Carton is coloured green, black and white.
Acquisition Information:
Donation from Mrs Kennedy, 1984
Discipline: Technology
Dimensions: 40 mm (Width), 93 mm (Length)

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 on can: OAK VIBRATOR UNIT / NON-SYNCHRONOUS / MSP / MADE IN AUSTRALIA / No. V4012 / INPUT / 12 / VOLTS
Top end of can: V4012

Carton:
On two opposite sides: MSP / OAK / VIBRATOR / UNIT / M. S. P. Manufacturers of / VARIABLE CAPACITORS / LOUDSPEAKERS OAK SWITCHES / MINIATURE VALVE SOCKETS / AIR TRIMMERS
On two opposite sides: MSP / OAK / VIBRATOR / UNIT / MADE IN AUSTRALIA BY / MANUFACTURERS SPECIAL / PRODUCTS PTY LTD
On ends of box: MSP / V4012
Manufacturer: Manufacturers Special Products Pty Ltd, circa 1950

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