721A US version

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

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  • Year
  • 1959
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 250499

 Technical Specifications

  • Number of Transistors
  • 7
  • Semiconductors
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 50 to 60 cycles, 115V or 50 to 60 cycles, 230 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: 721A [US version] - Hewlett-Packard, HP; Palo Alto
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 7 x 4.375 x 5.25 inch / 178 x 111 x 133 mm
  • Notes

  • The Hewlett Packard 721A is an AC operated DC power supply.  Has a variable output from 0 to 30VDC and a full load current of 150mA. Has output overload protection.  Input power can be changed from 115V to 230V operation by changing jumpers on the power transformer.

    The Schematic and complete manual located here:
    www.hparchive.com/manuals/HP-721A-Manual.pdf

    NOTE: There is another Hewlett Packard model HP-721A but it is a completely different unit distributed in Europe.

  • Net weight (2.2 lb = 1 kg)
  • 4 lb 0 oz (4 lb) / 1.816 kg
  • Literature/Schematics (1)
  • see notes for link to schematic and manual
  • Author
  • Model page created by William Noble. See "Data change" for further contributors.

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The model 721A is part of the collections of the following members.

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