WHYY-TV was launched (debuted) on September 2, 1957 on UHF Channel 35.
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In 1963, WHYY-TV changed channels from UHF Ch. 35 into VHF Channel 12.
WHYY-TV PBS 12 welcomes a new partner is WDPB-TV PBS 64 Seaford-Dover, DE-Salisbury, MD-VA it debuted on December 4, 1981.
Used for productions distributed nationally on PBS
Secondary logo (1994–1997)
TV stations in the Delaware Valley, including Philadelphia, Northern Delaware, South Jersey and the Lehigh Valley