Royal 705JM Ch= 7MT45Z8

Zenith Radio Corp.; Chicago, IL

  • Year
  • 1964/1965
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 87428
    • alternative name: Chicago Radio Lab

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

 Technical Specifications

  • Number of Transistors
  • 7
  • Main principle
  • Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / Batteries: "AA" 4 x 1.5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3.5 inch = 8.9 cm
  • Power out
  • 0.2 W (0.295 W max.)
  • Material
  • Leather / canvas / plastic - over other material
  • from Radiomuseum.org
  • Model: Royal 705JM Ch= 7MT45Z8 - Zenith Radio Corp.; Chicago,
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 7.25 x 5.5 x 3 inch / 184 x 140 x 76 mm
  • Notes
  • The Zenith Royal 705JM is a portable, battery operated 7 transistor BC band receiver. The BC band frequency tuning range is 540 to 1600kHz.  Uses Qty(4) "AA" batteries. Has RF stage and push-pull audio output stage.  Also has earphone jack that disconnects the speaker for private listening. Has leather covered cabinet.

    The Royal 705 family of radio's consisted of the following models that use the same schematics and cabinets:

    Model Chassis Cabinet Color
    Royal 705JM 7MT45Z8 Brown
    Royal 705YM 7MT45Z8 Ebony
    Royal 705JM 7MT45Z9 Brown
    Royal 705YM 7MT45Z9 Ebony

    The transistors are the only difference in the chassis.

    NOTE: Beitman lists model Royal 705M, however this is an incomplete model number.  The complete model numbers are listed in the table above.

  • Literature/Schematics (1)
  • - - Manufacturers Literature (Zenith Service Manual Model Royal 705M dated 5/7/65)
  • Author
  • Model page created by Egon Penker. See "Data change" for further contributors.

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