That was KTW-FM/KZOK Seattle around 1973-74. They kept Dr. Demento until the early 1980s, shuffling it off to then AM Alternative sister KJET 1590.Could have been. https://dmdb.org/cgi-bin/plinfo.pl?drd74.0707.html makes mention of a Seattle affiliate that received tape shipments from KMET prior to the official beginning of syndication.