Pioneer radio station KDKA has been called the oldest broadcast station in the world, but that is the subject of semantics and controversy. However you define it, KDKA marks it first date of broadcast as November 2, 1920 when they broadcast the presidential and local election returns.
KDKA was a regular reception in Spokane in 1970 but this had to wait for KSWS and KGBS to sign off for the day. Currently, 1020 is a crowded channel with many newer stations on the air. This has made clear reception of KDKA difficult in much of North America.
They sent a 50th anniversary commemorative QSL card for my reception report. If they commemorate their 100th anniversary with a new QSL card, it would be cool to receive one from them.