radiomuseum.org

Royal 500 Ch=7ZT40 "Revised" 3rd Production

Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1831599) Radio
 
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1831600) Radio
 
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1831601) Radio
 
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1831602) Radio
 
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1831603) Radio
 
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1831604) Radio
 
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1831605) Radio
 
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1831606) Radio
 
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1831607) Radio
 
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1831608) Radio
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1388386) Radio Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 60846) Radio
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 380052) Radio Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 2439371) Radio
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1388391) Radio Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1388392) Radio
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1388393) Radio Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1388387) Radio
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1388388) Radio Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1388389) Radio
Use red slider bar for more.
Royal 500 Ch=7ZT40 'Revised'; Zenith Radio Corp.; (ID = 1388386) Radio
Zenith Radio Corp.;: Royal 500 Ch=7ZT40 "Revised" [Radio] ID = 1388386 480x640
Select picture or schematic to display from thumbnails on the right and click for download.
For model Royal 500 Ch=7ZT40 'Revised' 3rd Production, Zenith Radio Corp.; Chicago, IL
 
Country:  United States of America (USA)
Manufacturer / Brand:  Zenith Radio Corp.; Chicago, IL
alternative name
 
Chicago Radio Lab
Year: 1957/1958 perfect model Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) 7: 2N194 2N193 2N216 2N216 1N295 2N35 2N35 2N35
Main principle Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)
Tuned circuits 5 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Dry Batteries / "AA" 4 x 1.5 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.75 inch = 7 cm
Power out 0.1 W (0.18 W max.)
from Radiomuseum.org Model: Royal 500 Ch=7ZT40 "Revised" [3rd Production] - Zenith Radio Corp.; Chicago,
Material Modern plastics (no Bakelite or Catalin)
Shape Very small Portable or Pocket-Set (Handheld) < 8 inch.
Dimensions (WHD) 3.5 x 5.75 x 1.5 inch / 89 x 146 x 38 mm
Notes

The Zenith Royal 500 is a battery operated 7 transistor portable BC band radio. The BC band frequency tuning range is 540-1600kHz. The 3nd production run had 2 different chassis due to limited quantities of transistors from various manufacturers.  Chassis have chassis numbers along with a color code dot in battery compartment.

Year Production
Run
Chassis
Number
Chassis
Type
Transistor
Source
Color Code
Dot
Cabinet
Colors
55/56 1 7XT40 Circuit 1 Hand Wired Sylvania Black R,Y
55/56 1 7XT40 Circuit 2 Hand Wired Sylvania Maroon R,Y
55/56 1 7XT40Z Hand Wired Raytheon Red R,Y
55/56 1 7XT40Z1 Hand Wired Texas Instr. Green R,Y
56/57 2 7XT40 Hand Wired Sylvania Magenta R,W,Y
56/57 2 7XT40Z1 Hand Wired Texas Instr. Brown R,W,Y
57/58 3 7ZT40 "Revised" PCB Sylvania Magenta L,R,V,W,Y
57/58 3 7ZT40Z PCB Raytheon Orange L,R,V,W,Y

The two 7XT40 chassis from the 1st production run are similar except use different transistors. See notes below for colors.

Net weight (2.2 lb = 1 kg) 1 lb 3 oz (1.187 lb) / 0.539 kg
Source of data -- Original-techn. papers.
Mentioned in Zenith Transistor Radios
Literature/Schematics (1) Transistor Radios 1954-68 (Antique Radio Magazine n.61, June-July 2004, page 53 (Ita/Eng). Free at Aldo Andreani's website.)
Literature/Schematics (2) - - Manufacturers Literature (Zenith Supplementary Service Manual No.2 "Royal 500" Chassis 7ZT40 "Revised" 7ZT40Z)
Literature/Schematics (3) - - Manufacturers Literature (Zenith Supplementary Service Manual "Royal 500" All Transistor Portable Radio Chassis 7ZT40 7ZT40Z1)
Literature/Schematics (4) - - Manufacturers Literature (Zenith Service Manual "Royal 500" All transistor Portable Radio)
Documents regarding this model
  Radio a transistor tascabili americane: Zenith Royal 500 “Owl Eyes” (Per cortesia di L.Salvatore/ARM) 3327 KB

Model page created by Arpad Roth † 27.3.17. See "Data change" for further contributors.



All listed radios etc. from Zenith Radio Corp.; Chicago, IL
Here you find 4264 models, 3890 with images and 3381 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Zenith Radio Corp.;: Royal 500 Ch=7ZT40 "Revised"
Threads: 1 | Posts: 2
Hits: 1879     Replies: 1
zenith: (Ch=7ZT40 7ZT40Z 7ZT40Z1); Royal 500
Eckhard Wegner
27.Aug.07
  1

netto 600 gr

Arpad Roth † 27.3.17
27.Aug.07
  2

Bitte am Modellblatt, rechts unten klicken

Änderungsvorschl. anbringen und dann das Gewicht eintragen.

 
Zenith Radio Corp.;: Royal 500 Ch=7ZT40 "Revised"
End of forum contributions about this model

  
rmXorg