Transistorized AC Millivoltmeter VM78

Advance Electronics / Components Ltd.; Hainault, Wrexham

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  • Year
  • 1962 ?
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 332673

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Wave bands
  • - without
  • Power type and voltage
  • Dry Batteries
  • Loudspeaker
  • - - No sound reproduction output.
  • from Radiomuseum.org
  • Model: Transistorized AC Millivoltmeter VM78 - Advance Electronics /
  • Shape
  • Tablemodel, with any shape - general.
  • Notes

  •  The VM78 is fully transistorized and is powered by mercury cells, with an accuracy of ±3% over the frequency range of 1kHz to 1MHz. Being independent of mains supply it provides a hum-free performance and enables measurements to be taken on circuits not referred to earth.

    The voltmeter covers from 1mV to 300V AC in twelve ranges and the meter has two overlapping scales and a decibel scale referred to 1mW into 600Ω. Protection against excess input voltages is incorporated on all ranges.

    The input impedance is 2MΩ shunted by between 12 and 30pF according to range.

  • Mentioned in
  • Electronic Engineering, volume 34, July 1962
  • Author
  • Model page created by Pier Antonio Aluffi. See "Data change" for further contributors.

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