A bunch of interval signals here.
My favorite is Radio Nederland.
https://www.youtube.com/watch?v=sf_UzdvTyKQ
I used to have the Radio Nederland IS as the ringtone on my phone. Thanks for posting this. It will be fun to revisit them.
Seems like a few shortwave listeners on this FReeper thread.
Listening on the tube Hallicrafters World Band radio— with a DIAL, not digital. Could pull in stations from across the ocean and then some if the atmospherics allowed. Radio Tirana/Radio Albania had some shows the mouthpiece of Red China in Mao days— could almost hear the spit hitting the microphone.
Radio Cuba— once on and dialed in had a segment near the top of every hour with a loud ticking electronic clock, then the time given. Propaganda all the time for Fidel.
During the Nuclear scare (which dems love to replicate, and do it out of their own incompetence in foreign policy) shortwave was thought (and may still be) to be all that would be left to communicate with what was left of the world— apocalyptic fears. Sort of like the defeatism and national suicide portrayed in Australia with “On the Beach”. Take your L-pill because the radiation cloud is coming. Somehow this did not occur when the very real Chernobyl cloud destroyed Laplanders and their reindeer with radiation. Soviets leave a wasteland wherever they go.
I used to listen to Radio Nederland via shortwave in 1971.
I think I still have a QSL card from the 60s.