Code Practice Oscillator Codemaster CPO-128

Bud Radio Inc.; Cleveland (OH)

  • Year
  • 1953
  • Category
  • Amateur Equipment (Other, but not Key)
  • Radiomuseum.org ID
  • 287046

 Technical Specifications

  • Number of Tubes
  • 1
  • Wave bands
  • - without
  • Power type and voltage
  • AC/DC-set / 110 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Code Practice Oscillator Codemaster CPO-128 - Bud Radio Inc.; Cleveland OH
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 5.5 x 6.5 x 3.5 inch / 140 x 165 x 89 mm
  • Notes
  • The Bud Radio Codemaster CPO-128 is a code practice oscillator that can be used as a speaker or cpo by selecting "M" (monitor) or "C" (code) on the side of the cabinet. 

    There are three versions of the Bud CPO-128: CPO-128, CPO-128A and CPO-128B. This version, with the 117L7GT or 117N7GT or 117P7GT tube, red lettering and cross-hatched grill, had one side of the AC line directly connected to the key, creating a safety hazard and was changed to the CPO-128A. The three possibilities of tubes are a combination AF amp and power rect.

  • Price in first year of sale
  • 14.48 USD
  • Mentioned in
  • QST (August 1953 page 75)
  • Author
  • Model page created by Wayne Childress. See "Data change" for further contributors.

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