• Country
• United States of America (USA)

• Manufacturer / Brand
• Clapp-Eastham Co.; Cambridge, MA

• Year
• 1927/1928

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 35293

• • Brand: Radak

• Number of Tubes
• 1

• Valves / Tubes
• Multivalve

• Main principle
• TRF with regeneration; 2 AF stage(s)

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Wooden case

• from Radiomuseum.org
• Model: Baby Emerson Loud Speaker Set [.] - Clapp-Eastham Co.; Cambridge,

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

• Notes
• The Baby Emerson Loud Speaker Set uses the "Emerson Multivalve", a triple triode with a common filament (actually three filaments in series). The multivalve was manufactured by the Emerson Radval Corporation, 25 West 43rd Street, New York City, N. Y., which should not be confused with the Emerson Radio & Phonograph Company. The circuitry consists of a regenerative detector and two stages of audio frequency (AF) amplification. See also the model Standardyne Multivalve from Standard Radio Corp, where the Multivalve tube is employed as an RF amplifier, detector and AF amplifier.

• External source of data
• Ernst Erb

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

• Mentioned in
• Radio Manufacturers of the 1920s, Vol 1

• Literature/Schematics (1)
• Collector's Guide to Antique Radios (6th edition)

• Other Models

• Here you find 130 models, 107 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Clapp-Eastham Co.; Cambridge, MA