• Country
• United States of America (USA)

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

• Year
• 1967 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 179642

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

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Line / Batteries (any type) / 115; 230; 4 x 6 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: DC Null Volt-Ammeter 419A - Hewlett-Packard, HP; Palo Alto

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 198 x 160 x 205 mm / 7.8 x 6.3 x 8.1 inch

• Notes
• Ranges:+/-3µV to +/-1000V dc in 18 zero-center ranges.
  Accuracy:+/-2% of range +0,1µV.>br />Zero drift:<0,5µV/ day after 30 min warm-up.
  DC Ammeter Ranges:+/-30pA to +/-30nA in 7 zero center ranges.
  Eine Mercury (Quecksilber) Batterie 1,35V ist eingebaut. 4 x 6 V zur Erzeugung von +-12 V.

• Net weight (2.2 lb = 1 kg)
• 3.7 kg / 8 lb 2.4 oz (8.15 lb)

• Price in first year of sale
• 475.00 $

• Source of data
• - - Data from my own collection

• Author
• Model page created by Rudolf Osterkamp. See "Data change" for further contributors.

• Other Models

• Here you find 395 models, 363 with images and 139 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hewlett-Packard, (HP); Palo Alto, CA