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Vibrator - MSP Oak, Type V6632, circa 1950 Object Reg. No: ST 035817

Summary:
M. S. P. vibrator, in original carton, used for farm radios designed to run from 32 Volt DC supply. 32 Volt DC supplies were frequently used on farms before the advent of mains power.

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 V6632 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 M. Kennedy
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. V6632 / INPUT / 32 / VOLTS / DUAL INTERUPTER
Top end of can: V6632

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 / DUAL INTERUPTER / V6632
Manufacturer: Manufacturers Special Products Pty Ltd, Australia, circa 1950

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