Vacuum Tube Voltmeter 400D 6625-643-1670

• Country
• United States of America (USA)

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

• Year
• 1954

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 81357

• Picture
• Schematics

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

• Number of Tubes
• 8

• Valves / Tubes
• 6CB6 6CB6 6CB6 6CB6 6CB6 6AX5 12B4A 6U8 5651

• Wave bands
• - without

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

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Vacuum Tube Voltmeter 400D 6625-643-1670 - Hewlett-Packard, HP; Palo Alto

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 7.5 x 11 x 12 inch / 191 x 279 x 305 mm

• Notes

• 1mV to 300V in 12 ranges, 10Hz to 4MHz, -72dB to +53dB, 10Mohms input impedance.

• Net weight (2.2 lb = 1 kg)
• 8.1 kg / 17 lb 13.5 oz (17.841 lb)

• Price in first year of sale
• 225.00 $

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

• Literature/Schematics (1)
• Electronics, April 1955

• Literature/Schematics (2)
• HP Journal, Vol.5, No.9, May 1954

• Author
• Model page created by Bernd Pötzsch. See "Data change" for further contributors.

• Other Models

• Here you find 394 models, 362 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