• Country
• United States of America (USA)

• Manufacturer / Brand
• Hewlett-Packard, (HP); Palo Alto, CA

• Year
• 1966

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 75950

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

• Number of Transistors
• 14

• Semiconductors

• Power type and voltage
• Storage and/or dry batteries / 115/230;22,5 Volt

• Material
• Metal case

• from Radiomuseum.org
• Model: Voltmeter 427A - Hewlett-Packard, HP; Palo Alto

• Dimensions (WHD)
• 130 x 164 x 204 mm / 5.1 x 6.5 x 8 inch

• Notes
• The Hewlett-Packard Model 427A is a versatile, compact, self-contained voltmeter. It is capable of making dc measurements from 1 mV to 1000 volts, ac measurements from O. 3mVto 300 volts at frequencies from 10 Hz to 1 MHz, and resistance measurements from 0.2 ohms to 500 megohms. With the 01 option, the Model 427A may be powered either by a 115 or 230 volt line or by an internal 22-1/2 volt dry cell battery. Transistorvoltmeter: Wechselspannung 10mV-300V; Gleichspannung 100mV-1000V; Widerstand 10 Ohm-10 MOhm; Ri=10 MOhm.

• Price in first year of sale
• 195.00 $

• Source of data
• -- Original-techn. papers.

• Literature/Schematics (1)
• -- Original-techn. papers.

• Author
• Model page created by Martin Renz. See "Data change" for further contributors.

• Other Models

• Here you find 391 models, 359 with images and 138 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hewlett-Packard, (HP); Palo Alto, CA