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Radios - Zenith Royal 500B Maroon 1957 |  |
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Radios Zenith Royal 500B Maroon, 1957 Maroon, Chassis 7ZT40Z1. The 1st Production used Raytheon transistors. This radio has 7 transistors, 4 blue Raytheon transistors with a brown dot on them: (121-9/2N111/CK759, 121-10/2N111A/CK759A, 121-10/2N111A/CK759A, 121-14/2N112/CK760) It has 3 silver Raytheon transistors (121-11/CK882, 121-12/CK888, 121-12/CK888) and 1 1N87 diode. On label: 121-16, 121-15, 121-17, 121-17, 121-18, 121-19, 121-19, unbreakable nylon case. Identified with a brown dot in the battery compartment. Transistor Layout Label has Brown print, 102-2266. This is the 2nd version of the first transistor portable made by Zenith in the USA. 
The next Vintage Electronics Expo
will be on Saturday, January 25, 2025
at the Oakland Expo Center, 2212 Mall Dr E, Waterford, MI 
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