F. B. Chambers & Company
217 North Ninth Street (April 1913, Popular Electricity magazine advertisement page 53)
2046 Arch Street    (January 1914, Modern Electrics and Mechanics magazine page 94)
Philadelphia, Pennsylvania

According to their catalog, Chambers began making wireless equipment in 1905. The Chambers company, according to an article by Ludwell Sibley in the August 1997 issue of Radio Age, was probably the first commercial maker of wireless equipment in Philadelphia. 

Also, see The AWA Review #32,  2019, pages 71-98, by William V. Goodwin, III for fuller details of the company's evolution from the early 1900s until 1947. The article is entitled, "F.B. Chambers & Co., Evolution of Philadephia's First Radio Manufacturer." 

Frank B. and Hester Chambers began operating their radio equipment manufacturing company in Philadelphia circa 1904. Radio history publications have covered some of the company’s story, and this paper provides additional insights into the company’s evolution, its locations in the city, and Hester’s contributions to the company’s development and success. Contemporary newspaper accounts reveal details of the couple’s courtship and early lives, and genealogical research further illustrates aspects of their families’ histories. Frank & Hester developed their wireless business in their first home—an apartment—and went on to open a multi-room factory adjacent to their next home. Although F. B. Chambers was most often cited as the driving force of the company, Hester was deeply involved in manufacturing, testing, and demonstrating or operating company products, which included components, receivers, and transmitters. They operated a radio store from the 1920s until Frank’s death in 1947. The devoted couple’s story is integral to their business development.