Here is a copy of the text of November 22, 1955 News Release of the Royal 500

Zenith Radio Corporation today announced the "Royal 500 all-transistor portable radio." This new portable radio uses seven transistors and weighs only 19 ounces, yet it is so powerful that it brings in weak, long distant stations which are ordinarily out of the range of 4-tranisistor miniature radios.

In announcing Zenith's first 7-transistor radio to the company's distributors, L.C. Truesdell, vice president and director of sales, stated that the battery cost for the Royal 500 is much lower than for the average set of this type. The Zenith set operates for approximately 1¢ per hour as compared to 6 to 17¢ an hour for small, compact vacuum tube portables.

The power source for this set is four, tiny penlite batteries that are readily available in many stores for ten cents apiece, he said. The batteries can easily be replaced in a matter of seconds.
Truesdell explained that the Zenith Royal 500 has an unusual amount of power output. "As a means of comparison, this new set has 100 milliwatts of undistorted power output compared to six to twelve milliwatts of undistorted power output in the usual 4-transistor instruments, and the unusually sensitive circuitry in the new Zenith portable is the result of the company's experience in building hearing aids that use transistors as a replacement for vacuum tubes," he said. "The new circuitry," he added, "accomplishes previously unheard of economy and takes full advantage of the improved performance that transistors provide." Zenith is the largest user of transistors in the United States with the one exception of the telephone company.

The Royal 500, which is 3-1/2" wide; 5-3/4" high and 1-1/2" deep, has a non-breakable case of nylon material that withstands severe impact, Truesdell stated. A convenient 3-position handle swings above the cabinet for "carry about" use; slides down and back of the radio to serve as a table support; or jugs the bottom of the cabinet when the set is tucked into purse or pocket.

The dial is clearly marked with Civilian Defense frequencies. Also the set has a socket for a handy earphone attachment, optional at slight extra cost, which plugs into the set for private radio listening and cuts off the regular speaker, Truesdell said.
Cabinetry is black or maroon color with a gold-colored trim. Suggested retail price of the receiver, Truesdell said, is $75.00, less batteries.


Zenith Radio Corporation
6001 West Dickens Avenue
Chicago 39, Illinois
Tel: Berkshire 7-7500



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