• Country
• France

• Manufacturer / Brand
• Lierre; Paris

• Year
• 1953 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 310537

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

• Number of Tubes
• 6

• Valves / Tubes
• EAF42 ECH42 ECH42 UY41 UY41 DG7-6

• Main principle
• Radio Frequency Amplification only

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 145; 220; 245 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Vobuloscope 111 - Lierre; Paris

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

• Dimensions (WHD)
• 340 x 260 x 200 mm / 13.4 x 10.2 x 7.9 inch

• Notes

• This vobuloscope (wobbulator and scope) was used to align MF circuits and other tuned circuits of tube radios.

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  There are two RF circuits in this measuring device:
  
  The first circuit consists of a Colpitts oscillator with seven fixed frequencies and one variable frequency.
  The second circuit, the wobbulator, consists of a Hartley oscillator with a fixed frequency of 574 kHz. 
  A mix of both signals can be found on the RF output.

  ---

  Output frequencies:

  RF output:
  160 kHz, 264 kHz, 904 kHz, 1400/574 kHz, 6,5 MHz, 12 MHz, 16 MHz, 450...500 kHz.

  Wobbulator: 574 kHz, max. frequency sweep ± 14 kHz.
                  
  BF output: 400 Hz

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

• Author
• Model page created by Ludo Withofs. See "Data change" for further contributors.

• Other Models

• Here you find 6 models, 2 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Lierre; Paris