English: Radio was the new news and entertainment media in the 1920s. This photo shows Diefenderfer's Furniture at 39-41 North Tenth Street in 1929.

The building dates to about 1913 as a the Model Troy Laundry Company, becoming the Allen Laundry in 1922. Allen Laundry closed in 1925, and the property was purchased by Diefenderfer & Willenbecher, an electrical contracting firm. In 1926 the company branched out to sell electrical appliances, including home radios and furniture. It was owned by Orlando Diefenderfer and his wife, Mary S. Unfortunately, the business did not survive the Great Depression, closing in 1931.

With Diefenderfer's closure, the building was purchased by Lehigh Valley Broadcasting, and it became the home of WCBA and WSAN radio broadcasting studios. The two stations shared their broadcast time on the same frequency, 1440 kHz (later 1470). The two stations were operating essentially as one; the same staff broadcast over the same transmitter from the same studios — only the call letters were changed, depending on the time of day. In 1937, the two stations finally asked the FCC to approve a merger, with the Allentown Morning Call (which owned WSAN) owning 65 percent and the Musselman family (which owned WCBA) 35 percent. They proposed that WSAN would become a full-time station; WCBA would be deleted.

When the Allentown application arrived at the commission, they realized that its approval would result in one company controlling both the town’s only newspaper as well as its only radio station. In the end, it was another FCC decree that forced a decision in the Allentown case: the 1944 duopoly rule, which prevented the ownership of more than one station in a market by a single entity. The Morning Call sold out its interest in WSAN and the Mussleman family obtained full ownership of WSAN.

WSAN built new studios in Whitehall township in 1956 and it moved to its new home later that year. The building was redeveloped into apartments after the radio station left, and remains an apartment building to this day.

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