• Country
• United States of America (USA)

• Manufacturer / Brand
• Hickok Electrical Instrument Co.; Cleveland, OH

• Year
• 1954 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 270756

• • alternative name: Hickock

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

• Number of Tubes
• 19

• Valves / Tubes
• 12AU7 6J6 6J6 12AU7 6AL5 12AU7 884 12AU7 12BH7 12AV7 12AV7 6CL6 6CL6 12AU7 5Y3 1X2B 1X2B 0B2 5ABP1

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

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Oscillograph 640AF - Hickok Electrical Instrument

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 12 x 14 x 18 inch / 305 x 356 x 457 mm

• Notes

• Single channel Service Oscilloscope with 5" round CRT 5ABP1. The AF of this special model may stand for U.S. Air Force.

  Vertical Channel: DC or AC coupled with input impedance of 2.2 MOhm || 50 pF
  Sensitivity: 10 mV/inch (narrow BW 2.5 MHz)  or 35 mV/inch (wide BW 5 MHz)
  Input Attenuator: x1 - x10 - x100 - x1000  max. 1000 V RMS
  Horizontal Channel: 75 mV RMS/inch  with bandwidth of 500 kHz
  Sweep Range: 0.5 s to 30 µs (2 Hz to 30 kHz)
  Power consumption: 135 W  105 - 125 VAC 50 - 400 Hz

  As a special feature, there is access to the deflection plates via a separate cover on top of the case.

• Net weight (2.2 lb = 1 kg)
• 50 lb (50 lb 0 oz) / 22.7 kg

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

• Author
• Model page created by Franz Harder. See "Data change" for further contributors.

• Other Models

• Here you find 152 models, 136 with images and 43 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hickok Electrical Instrument Co.; Cleveland, OH