Many thanks to SRAA contributor Dan Greenall, who shares the following recording and notes:

Broadcaster: Radio Cairo circa 1971

Frequency: 9.475 MHz

Reception location: Ancaster, Ontario, Canada

Receiver and antenna: Hallicrafters S-52 using a longwire antenna

Notes: I don't recall Radio Cairo having an interval signal but this music was heard at the beginning of every broadcast. They used this frequency for as long as I can remember, and I was quite excited to receive their exotic looking QSL. My receiving equipment consisted of a Hallicrafters S-52 hooked up to an outdoor longwire antenna.