• Country
• Germany

• Manufacturer / Brand
• Ontra - Werkstätten; Berlin

• Year
• 1935 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 133000

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

• Number of Tubes
• 4

• Valves / Tubes
• AC2 AC2 AB2 AZ1

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• Alternating Current supply (AC)

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Prüfsender 954 - Ontra - Werkstätten; Berlin

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 500 x 330 x 165 mm / 19.7 x 13 x 6.5 inch

• Notes
• Ontra Prüfsender 954 verfügt über folgenden Frequenzbereich:
  150kHz-375kHz
  500Khz-1680kHz
  HF-Ausgangsspannungen: 0,5mV 5mV 50mV
  NF-Ausgangsspannungen: 0,1V 10V

• Net weight (2.2 lb = 1 kg)
• 6.5 kg / 14 lb 5.1 oz (14.317 lb)

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

• Author
• Model page created by Wolfgang Sundhaus. See "Data change" for further contributors.

• Other Models

• Here you find 31 models, 28 with images and 9 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ontra - Werkstätten; Berlin