• Country
• United States of America (USA)

• Manufacturer / Brand
• Bristol Co., The; Waterbury (CT)

• Year
• 1924

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 34585

• Number of Tubes
• 4

• Valves / Tubes

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown); 3 AF stage(s); Reflex

• 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: Bristol Single Control Radio Receiver Using Grimes Inverse Duplex System - Bristol Co., The; Waterbury CT

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

• Notes
• One dial (primary tuning control knob). It is not clear if this set is identical or not with the "old" 1923 issue. The Bristol Single Control Radio Receiver utilized the Grimes Inverse Duplex System. This four tube set had the power of six tubes because the Grimes Inverse Duplex System utilizes the first two tubes for both radio and audio amplification. The familiar Bristol One Stage Power Amplifier is incorporated into this set as the last stage of audio amplification. Radio had a solid mahogany case.

• Price in first year of sale
• 190.00 $

• External source of data
• Ernst Erb

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

• Literature/Schematics (4)
• March 1924 QST advertisement page 53

• Other Models

• Here you find 12 models, 11 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Bristol Co., The; Waterbury (CT)