Vefsuper Lux (Geographic 37) MD/37 Tischmodell

VEF Radio Works (Valst Elektrotechniska Fabrika, ВЕФ); Riga

  • Year
  • 1936/1937
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 30341

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

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • Superheterodyne (common); ZF/IF 468 kHz; 2 AF stage(s)
  • Tuned circuits
  • 7 AM circuit(s)
  • Wave bands
  • Broadcast, Long Wave and Short Wave.
  • Power type and voltage
  • Alternating Current supply (AC) / 120; 220 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 20 cm = 7.9 inch
  • Power out
  • 5 W (unknown quality)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Vefsuper Lux MD/37 [Tischmodell] - VEF Radio Works Valst
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 580 x 320 x 280 mm / 22.8 x 12.6 x 11 inch
  • Notes
  • VEF Riga has used the Ingelen Geographic Scale but not the chassis to build this Vefsuper Lux "Geographic 37" or MD/37. Ingelen did not build a Geographic with this tube line up and the same IF frequency or a chassis with 4 knobs in the same distance between each except US25W which chassis looks quite different. The Vefsuper Lux is quite searched for because not only the scale is seldom but the style is special and the Vefsuper Lux won the Grand Prix on the World Exhibition in Paris 1937. See below the scale the 3-element Neon-tuning indicator.
  • Net weight (2.2 lb = 1 kg)
  • 15 kg / 33 lb 0.6 oz (33.04 lb)
  • Price in first year of sale
  • 335.00 LVL
  • Author
  • Model page created by Atis Brikmanis. See "Data change" for further contributors.

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The model Vefsuper Lux (Geographic 37) is part of the collections of the following members.

 Forum

Forum contributions about this model: VEF Radio Works: Vefsuper Lux MD/37

Threads: 2 | Posts: 5

My MD/37 has some differences frmo teh schematic that is shown. The tone control  and valve use differences are described in my previous post

In addition, the mains input has a series L, C to ground filter on each side. The capacitors to the chassis were each in series with a fuse.

Scott Robinson, 30.Aug.09

Weitere Posts (1) zu diesem Thema.

 The MD37 that I have has different valves from the all A-series shown in the listing page. The audio output valve is an EL3 and the IF amplifier is an EF6. I believe these to be as built at the factory, since the heater winding of the power transformer is tapped for both 4V and 6V3, and separate wiring is provided for 4V and 6V3 valves. I presume either valve shortages or a cost advantage for the E- series valves must be the cause, since the extra heater wiring would cost something to do.

Also, the switch on the bandwidth control is different. The schematic shows a single switch, but this radio has two, operated by two different cams at different points in the rotation. The result is either nothing connected to the anode of the first audio amp, or 1.4 nF, or 5 nF to ground, with more capacitance being added added as the bandwidth increases.

Scott Robinson, 05.Jul.09

Weitere Posts (4) zu diesem Thema.