In the 1970’s I got all of South Africa’s radio offerings on shortwave including the local broadcasts SABC English and Springbok Radio.
My high school library here in the USA also had “South African Panorama’ magazine on the shelf an official government publication.
That was one of my favorites.
A bunch of interval signals here.
My favorite is Radio Nederland.
https://www.youtube.com/watch?v=sf_UzdvTyKQ
I’m another one. I had a shortwave setup in Japan in the late 60s, listened to Moscow and Peking along with Japan, BBC and VOA. Back in the states, I added RSA, Radio Nederland from Bonaire, HCJB from Quito, and Radio Havana, getting Japan only when conditions allowed. It taught me how to hear the truth behind the propaganda.
Today anyone can get communication from anywhere, but the romance of distance and space has been lost. Listening once again to the RSA bird brought all that back to me. Thank you.
OMD’s “Dazzle Ships” featured two Interval Signals.
Radio Prague
https://www.youtube.com/watch?v=9oWSJpIHhYk
Swiss Radio International
https://www.youtube.com/watch?v=Kx-9woEPTZU