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Zenith Royal
500E Long Distance - Chassis 8CT40Z2 - Zenith Radio Corporation - Chicago, Illinois,
USA 1959. This model of Royal 500 was introduced in the late 1950s and proved to be a very reliable and very sensitive portable transistor receiver. Comparing its dimensions and weight with the first transistor radio, the Regency TR1, the Royal 500 was not exactly a "pocket" receiver as the later Royal 50 series would have been, furthermore at the beginning of the 60s the US market was invaded by millions of specimens of very small Japanese radios such as the excellent TR-610 and the following ones. For this reason and to remain in the market, the Zenith Corporation had to reduce the price of the Royal 500 from the initial $75 to $59. In any case, the 500E achieved good sales success due to its excellent performance. The receiver used a superheterodyne circuit equipped with 8 germanium transistors: 2N544, 2N411, 2N409, 2N409, 2N409, 2N407, 2N407, 2N407 and a germanium diode 1N87G. The antenna was wound on a good sized ferrite core, the variable capacitor was air insulated and the 2.75 inch loudspeaker provided good audio reproduction. The power supply of the Royal 500 could be provided by four 1.5V AA type carbon zinc batteries, or by inverting their polarities, with 4 rechargeable mercury AA batteries (subsequently prohibited due to toxicity). The dimensions were: 3.5 x 5.7 x 1.5 inch (WxHxD), and the weight without batteries was 1 lb 1.6 oz. Historical cold war note: As in other radio receivers with Medium Wave reception built and marketed in the U.S.A. starting from 1951 until 1963, it can be noted that also in this Zenith the acronym CD (Conelrad) is impressed on the dial scale in correspondence with the two nuclear warning frequencies of 640 and 1240 kHz. (For more information follow this link). © IK3HIA 2008. |
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Zenith Royal 500E Long Distance - Chassis 8CT40Z2 - Zenith Radio Corporation - Chicago, Illinois, USA 1959. Questo modello di Royal 500 fu introdotto verso la fine degli anni '50 e si rivelò un ricevitore portatile a transistor molto affidabile e veramente sensibile. Confrontandone le dimensioni e il peso con la prima radio a transistor, la Regency TR1, la Royal 500 non era propriamente un ricevitore da "taschino" come invece lo sarebbe stata la successiva serie Royal 50, inoltre all'inizio degli anni 60' il mercato USA fu invaso da milioni di esemplari di piccolissime radioline Giapponesi come l'ottimo TR-610 e le seguenti. Per tale motivo e per rimanere nel mercato, la Zenith Corporation dovette ridurre il prezzo della Royal 500 dagli iniziali 75$ a 59$. In ogni caso il 500E ottenne un buon successo di vendite per le sue ottime prestazioni. Il ricevitore utilizzava un circuito supereterodina equipaggiato con 8 transistor al germanio: 2N544, 2N411, 2N409, 2N409, 2N409, 2N407, 2N407, 2N407 and a germanium diode 1N87G. L'antenna era avvolta su un nucleo in ferrite dalle discrete dimensioni, il condensatore variabile aveva l'isolamento ad aria e l'altoparlante da 7 cm forniva una buona riproduzione audio. L'alimentazione della Royal 500 poteva essere fornita da quattro batterie zinco carbone da 1,5V del tipo AA oppure, invertendone le polarità, con 4 batterie a stilo ricaricabili al mercurio (in seguito proibite causa tossicità). Le dimensioni erano: 14,6 x 9,3 x 4,3 cm (L,A,P), e il peso senza batterie era di 496 g.
Nota storica sulla guerra
fredda: © IK3HIA 2008. |
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