• Country
• United States of America (USA)

• Manufacturer / Brand
• Zenith Radio Corp.; Chicago, IL

• Year
• 1964

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 247863

• • alternative name: Chicago Radio Lab

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

• Number of Transistors
• 6

• Semiconductors

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s); Super Regenerativ

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 2 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2 inch = 5.1 cm

• Power out
• 0.08 W (0.135 W max.)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Royal 40F Ch= 6KT50Z1 - Zenith Radio Corp.; Chicago,

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Notes

• The Zenith Royal 40F is a battery operated 6 transistor BC band portable radio.  The chassis is a superheterodyne receiver with the first stage configured as an autodyne converter.  A diode is used for the detector.  Has push-pull output stage.  Uses Qty(2) 1.5V penlite AA batteries.  BC band frequency range is 540 to 1600kHz.  Sensitivity is approximately 350uV/m @ 15mW output. Cabinet color is Turquoise.

  Has earphone jack that disconnects the speaker for private listening.

  The Royal 40 series using the 6KT50Z1 chassis were available in the following colors:

  Model Number	Cabinet Color
  Royal 40C	Black
  Royal 40F	Turquoise
  Royal 40W	White

   

• Price in first year of sale
• 18.95 $

• Literature/Schematics (1)
• Zenith Transistor Radios

• Literature/Schematics (2)
• - - Manufacturers Literature (Zenith Service Manual Model Royal 40 Chassis 6KT50Z1)

• Author
• Model page created by Aldo Andreani. See "Data change" for further contributors.

• Other Models

• Here you find 4496 models, 4101 with images and 3615 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL