• Country
• United States of America (USA)

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

• Year
• 1965 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 250142

• • alternative name: Chicago Radio Lab

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

• Number of Transistors
• 8

• Semiconductors
• 2N2706 2N2706 2N993 2N993 2N993 2N993 2N993 2N2428

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Solar- and/or muscle driven, also addl. power jack possible / 4 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.75 inch = 7 cm

• Power out
• 0.08 W (0.12 W max.)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Royal 56 All Transistor Sun Charger R-555W - Zenith Radio Corp.; Chicago,

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

• Dimensions (WHD)
• 5.5 x 4.5 x 1.5 inch / 140 x 114 x 38 mm

• Notes

• The Zenith Royal 56-G is a solid state AM portable radio. The AM band frequency tuning range is 540 to1620kHz.  Operates from 3 different power sources: Rays of the sun, on batteries (4 x 1.5V) or from household current(120VAC). The solar cells are located in the carrying handle. Has push-pull audio output stage and earphone jack that disconnects the speaker for private listening.
  
  Finish in Charcoal Color with Chrome Trim or White Color with Chrome Trim.
  Came with Carry case, earphone attachment, AC Battery recharger line cord.

  The SAMS TSM-74 calls out models 555C and 555W. However the SAMS index for model 56-G refers to this same SAMS reference and so therefore is applicable for this model also.

  See also the Royal 555

• Literature/Schematics (1)
• Photofact TSM Transistor Radio Series SAMS (TSM-74 Sept 1966 pages 135-140)

Solar Radio History

2935 KB

• Documents regarding this model

• Author
• Model page created by Franz Scharner. See "Data change" for further contributors.

• Other Models

• Here you find 4492 models, 4097 with images and 3605 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL