• Country
• Germany

• Manufacturer / Brand
• Sennheiser Electronic (Labor W); Wennebostel

• Year
• 1955 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 138692

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

• Number of Tubes
• 2

• Valves / Tubes
• EF40 EF40 STV150/15

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 200-240 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Labor W, Tonfrequenz-Röhrenvoltmeter RV51 - Sennheiser Electronic Labor W;

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 260 x 190 x 90 mm / 10.2 x 7.5 x 3.5 inch

• Notes
• Tonfrequenz-Röhren-Voltmeter RV51.
  Messbereiche:
  0...8, 25, 80, 250, 800 mV, 2,5, 8, 25, 80, 250, 800 V
  -60...-40, -50...-30, ... +40...+60 dB
  Frequenzbereich: 30 Hz...20 kHz, Eingangswiderstand 50 kOhm, Eingangskapazität 20 pF, Kontroll-/Kopfhörerausgang <11 V bei R_i 20 kOhm.
  Gerät wurde auch von Grundig vertrieben: RV51.

• Net weight (2.2 lb = 1 kg)
• 4 kg / 8 lb 13 oz (8.811 lb)

• Author
• Model page created by Stefan Weigelt. See "Data change" for further contributors.

• Other Models

• Here you find 300 models, 286 with images and 143 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sennheiser Electronic (Labor W); Wennebostel