• Country
• United States of America (USA)

• Manufacturer / Brand
• Collins Radio Company; Cedar Rapids (IA)

• Year
• 1933

• Category
• Amateur Transmitter (only)

• Radiomuseum.org ID
• 173929

• Number of Tubes
• 5

• Valves / Tubes
• 47 46 46 80 83

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Transmitter 4 A - Collins Radio Company; Cedar

• Shape
• Tablemodel, with any shape - general.

• Notes
• Collins Transmitter 4A: covers 20, 40, 80 and 160 m ham bands (plug in coils).
  CW (A1) transmitter, 25W, tubes 47 (crystal oscillator), two 46 (final stage), 80 (oscillator power supply rectifier), 83 (high voltage rectifier).
  Low cost CW transmitter, early examples came with bakelite and later sets with black painted aluminum front panel.

• Mentioned in
• QST 12/1933

• Author
• Model page created by Martin Bösch. See "Data change" for further contributors.

• Other Models

• Here you find 101 models, 79 with images and 35 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Collins Radio Company; Cedar Rapids (IA)