• Paese
• USA (Stati Uniti d'America)

• Produttore / Marca
• Zenith Radio Corp.; Chicago, IL

• Anno
• 1958

• Categoria
• Radio (o sintonizzatore del dopoguerra WW2)

• Radiomuseum.org ID
• 172191

• • alternative name: Chicago Radio Lab

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

• Numero di transistor
• 8

• Semiconduttori
• 121-63 or. 2N544 or. 121-78 121-62 or. 2N411 121-65 or. 2N409 121-66 or. 2N409 or. 121-73 121-66 or. 2N409 or. 121-74 121-64 or. 2N407 121-61 or. 2N407 121-61 or. 2N407

• Principio generale
• Supereterodina con stadio RF; ZF/IF 455 kHz; 2 Stadi BF

• N. di circuiti accordati
• 5 Circuiti Mod. Amp. (AM)

• Gamme d'onda
• Solo onde medie (OM).

• Tensioni di funzionamento
• Batterie a secco / AA: 4 x 1.5 Volt

• Altoparlante
• AP magnetodinamico (magnete permanente e bobina mobile) / Ø 2.75 inch = 7 cm

• Materiali
• Plastica (non bachelite o catalina)

• Radiomuseum.org
• Modello: Royal 500RD Ch= 8AT40Z2 - Zenith Radio Corp.; Chicago,

• Forma
• Tascabile (portatile molto piccola), < 20 cm

• Annotazioni

• The Zenith Royal 500D family has two chassis, four transistor label colors, and two cabinet styles. The four chassis, in chronological order, are summarized in the following table. Note that only about 2,000 Type 1 chassis were made.

  Type	Chassis	Dot/ Label Color	RF	Mix	Osc	1st IF	2nd IF	Det	Drvr	Out x2	Man
  1	8AT40Z2	Black	121-63 2N544	121-62 2N411	121-65 2N409	121-66 2N409	121-66 2N409	103-19 1N87G	121-64 2N407	121-61 2N407	RCA
  2	8AT40Z2	Red	""	""	""	121-73	121-74	""	""	""	""
  3	8AT40Z2	Green	or -78	''	''	''	''	''	''	''	''
  4	8AT40	Blue	121-101 2N544	121-103 2N411	121-102 2N409	121-104 2N409	121-105 2N409	""	121-106 2N407	121-107 2N407	Syl

  The earlier first cabinet style had "LONG DISTANCE" stamped below the engraved "ZENITH" brand on the front. Initially, the colors were black and maroon. Later colors added were pink, tan, and white.

  The later second cabinet style added a black "500D" under the Zenith emblem (smaller than the first emblem) on the metal faceplate. A new inverted cone speaker was introduced, with the speaker grill also pushed out to accommodate the inverted cone. Not all 500D radios used the new speaker. The colors were black, maroon, and white.

  The earlier cabinet was used with Types 1, 2, and 3 chassis. The later cabinet was used with Types 2, 3, and 4 chassis.

  The five Royal 500D models are 500RD, 500WD, 500YD, 500D Ch= 8AT40Z2, and 500D Ch= 8AT40.

  Umfassende Beschreibung in Deutsch.

• Bibliografia
• Zenith Transistor Radios (pages 23-24.)

• Letteratura / Schemi (1)
• Photofact Folder, Howard W. SAMS (Set 422, Folder 17, Nov. 1958.)

• Letteratura / Schemi (2)
• -- Original-techn. papers. (Antique Radio Magazine n.61, June-July 2004, page 53 (Ita/Eng). Free at Aldo Andreani's website.)

• Letteratura / Schemi (3)
• -- Original-techn. papers. (Zenith Royal 500 Transistor Radios "Owl Eyes" booklet, Eldon A. Horton, pages 1-20.)

Radio a transistor tascabili americane: Zenith Royal 500 “Owl Eyes” (Per cortesia di L.Salvatore/ARM)

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• Documenti su questo modello

• Autore
• Modello inviato da Egon Penker. Utilizzare "Proponi modifica" per inviare ulteriori dati.

• Altri modelli

• In questo link sono elencati 4496 modelli, di cui 4101 con immagini e 3615 con schemi.
  Elenco delle radio e altri apparecchi della Zenith Radio Corp.; Chicago, IL