I also have videos here:
http://youtube.com/user/djringjr/
also a PlayList here:
https://www.youtube.com/watch?v=FyXhVI5p1mw&list=PLAFB911B0C2E555E4
The Playlist includes most of Alfredo 's excellent "Sparks, What's Going On" video archive.,
https://www.youtube.com/@sparkswhatsgoingon1671
Here's one of Rolf's latest videos:
Radio rooms on board North European cargo ships
https://www.youtube.com/watch?v=ZXkdtP_IxCw
73
DR