• Country
• United States of America (USA)

• Manufacturer / Brand
• Freshman Co. Inc., Chas.., (Polydyne); New York

• Year
• 1929

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 41059

• • Brand: C.A.Earl

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

• Number of Tubes
• 8

• Valves / Tubes
• 224 224 224 224 227 245 245 280

• Main principle
• TRF without regeneration; Screengrid 1926-1935

• Tuned circuits
• 4 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC)

• from Radiomuseum.org
• Model: Earl 33-S - Freshman Co. Inc., Chas..,

• Notes
• One dial (primary tuning control knob); Push-pull af output.

• External source of data
• Ernst Erb

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

• Circuit diagram reference
• Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

• Other Models

• Here you find 131 models, 79 with images and 44 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Freshman Co. Inc., Chas.., (Polydyne); New York