P780, P780A "Cross Country"

General Electric Co. (GE); Bridgeport CT, Syracuse NY

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  • Year
  • 1959
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 70396
    • Brand: Musaphonic

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

 Technical Specifications

  • Number of Transistors
  • 8
  • Main principle
  • Superhet with RF-stage; ZF/IF 455 kHz
  • Tuned circuits
  • 8 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / D: 6 x 1.5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5.25 inch = 13.3 cm
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: P780, P780A "Cross Country" - General Electric Co. GE;
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 10.875 x 8 x 4.125 inch / 276 x 203 x 105 mm
  • Notes

  • Some of the differences between the P780 family models are listed in the table below (antiqueradios forums, member 35Z5 "Ultimate GE P-780 ID & Differences Info").

    Model Transistors Front Top
    Marking    		 Front Bottom
    Marking    		 CD
    Marks    		 Notes
    P780A 8 Eight TRANSISTOR
    (between dials)    		 GENERAL ELECTRIC
    (right)    		 Y Production June 1959 to late 1959.
    P780B 8 Eight TRANSISTOR
    (between dials)    		 GENERAL ELECTRIC
    (right)    		 Y Production Dec '59/Jan. '60 to April 1961. 
    P780C --- --- --- --- Skipped over and never produced.
    P780D 8 [early runs]
    Eight TRANSISTOR
    (between dials)

    [late runs]
    GENERAL ELECTRIC
    (between dials)

    [early runs]
    GENERAL ELECTRIC
    (right)

    [late runs]
    none

    		 Y

    Production April/May1961 to early 1962.
     
    Ground/External Antenna terminals added [G A] (rear).
    P780E 8 GENERAL ELECTRIC
    (between dials)    		 none Y Production 1962.

    Xformer metal brace added to prevent PCB cracking (near speaker).
    P780G 8 Eight TRANSISTOR
    (between dials)    		 GENERAL ELECTRIC
    (right)    		 Y

    Rare
    Production 1963.

    Only version with added whip antenna and INT/WHIP switch (rear).
    P780F 8 [early runs]
    Eight TRANSISTOR
    (between dials)

    [late runs]
    GENERAL ELECTRIC
    (between dials)    		 [early runs]
    GENERAL ELECTRIC
    (right)

    [late runs]
    none    		 N Production 1964. 
    P780H 9 GENERAL ELECTRIC
    Long Range
    (between dials)    		 none N Production 1965 maybe into 1966.

     

  • Net weight (2.2 lb = 1 kg)
  • 4.1 kg / 9 lb 0.5 oz (9.031 lb)
  • Mentioned in
  • -- Original prospect or advert (Billboard Magazine, Jan. 12, 1959, pages 20 and 26)
  • Author
  • Model page created by Trev Levick. See "Data change" for further contributors.

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