• Country
• United States of America (USA)

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

• Year
• 1966

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 104845

• Number of Transistors
• 26

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 115; 230 Volt

• Loudspeaker
• - - No sound reproduction output.

• from Radiomuseum.org
• Model: DC Differential Voltmeter/Ratiom 3420A - Hewlett-Packard, HP; Palo Alto

• Dimensions (WHD)
• 425 x 127 x 324 mm / 16.7 x 5 x 12.8 inch

• Notes
• Eingangswiderstand im 1- und 10-V-Bereich 10¹¹ Ohm = 100.000.000.000 Ohm; bei 100 V und 1000 V = 10 MOhm; messbar mit 6 Stellen.

• Net weight (2.2 lb = 1 kg)
• 9.4 kg / 20 lb 11.3 oz (20.705 lb)

• Mentioned in
• -- Original-techn. papers.

• Author
• Model page created by Willi Ribbe. 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