Super 20 EGO

Baltic; Stockholm

Data
Forum
Pictures
Collections

  • Year
  • 1927
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 303894

 Technical Specifications

  • Number of Tubes
  • 7
  • Valves / Tubes
  • Main principle
  • Superheterodyne (common); ZF/IF 60 kHz; 2 AF stage(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Super 20 [EGO] - Baltic; Stockholm
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Dimensions (WHD)
  • 690 x 285 x 260 mm / 27.2 x 11.2 x 10.2 inch
  • Notes

  • The Baltic EGO is a variant of the Super 20 with a somewhat different line-up. After the 1st AF amplifier, the set has an additional 2-valve push-pull output amplifier to increase the loudspeaker drive power. The total number of valves in the set remains seven, because it has two IF amplifiers instead of three, and the separate local oscillator and mixer valves of the Super 20 are replaced by a single Radiotechnique twin-grid Micro-Bigril valve.

    As a result of these changes the layout of the components is different, notably in the front-end area, and there are three IF transformers instead of four, and three iron-cored AF transformers instead of one (which increases the weight of the set). Because of the push-pull AF output transformer, the loudspeaker is isolated from the HT supply.

    Valve complement:

    Micro-Bigril Frequency changer

    A425 1st IF amplifier

    A409 2nd IF amplifier

    A409 Detector

    R75 AF amplifier

    B406 (2) Push-pull AF output amplifier

    Coverage: 200-600m and 1000-2000m

  • Net weight (2.2 lb = 1 kg)
  • 13.8 kg / 30 lb 6.3 oz (30.396 lb)
  • Author
  • Model page created by Bruce Taylor. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model Super 20 is part of the collections of the following members.

 Forum