• Country
• United States of America (USA)

• Manufacturer / Brand
• Lakeside Supply Company; Chicago, Illinois

• Year
• 1925

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 46042

• • Brand: Microdyne

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

• Number of Tubes
• 7

• Valves / Tubes
• C301A C301A C301A C301A C301A C301A C301A

• Main principle
• Superheterodyne (common); ZF/IF 34 kHz; 2 AF stage(s)

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: 550EM Microdyne - Lakeside Supply Company;

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Notes
• Error in Coll.Guide: It is not a desk-type floor cabinet but an ordinary table model.

• Price in first year of sale
• 400.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Other Models

• Here you find 4 models, 2 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Lakeside Supply Company; Chicago, Illinois