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.

Physical Description

Metal cylinder with six pin base in original carton. Carton is coloured green, black and white.

More Information

  • Collecting Areas

    Information & Communication

  • Acquisition Information

    Donation from Mrs Kennedy, 12/11/1984

  • Manufacturer

    Manufacturers Special Products Pty Ltd, circa 1950

  • 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

  • Brand Names

    MSP (Electronic Components)

  • Classification

    Communications, Radio, Components

  • Category

    History & Technology

  • Discipline

    Technology

  • Type of item

    Object

  • Part Dimensions

    93 mm (Length), 40 mm (Width), 41 mm (Depth)
    Dimensions of packaging box.

  • Part Dimensions

    91 mm (Length)
    Dimensions of electronic component only.

  • Keywords

    Electronic Vibrators, Radios