AC Voltmeter (dB meter) 400FL

Hewlett-Packard, (HP); Palo Alto, CA

  • Year
  • 1966
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 189255

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

 Technical Specifications

  • Number of Transistors
  • 17
  • Semiconductors
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 220 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: AC Voltmeter 400FL - Hewlett-Packard, HP; Palo Alto
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 130 x 165 x 279 mm / 5.1 x 6.5 x 11 inch
  • Notes
  • The HP model 400 FL is a versatile AC dB voltmeter. It can be used as a wideband amplifier too. The 400FL has a linear dB scale with a logarithmic AC scale below. Frequency range from 20 Hz to 4 MHz with accuracy from 1% to 4%. Switchable 100 kHz  lowpass filter.

    Voltage range from 100 µV to 300 V full scale. Input impedance 10 megaohms shunted by 25 pF.

  • Net weight (2.2 lb = 1 kg)
  • 6 lb (6 lb 0 oz) / 2.724 kg
  • Source of data
  • -- Original-techn. papers.
  • Author
  • Model page created by Emilio Focosi. See "Data change" for further contributors.

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