The Birth of Radio Broadcasting (Part 1): Hanso Idzerda and his PCGG transmitter

https://www.youtube.com/watch?v=4n3kuAXxmJ0

The Birth of Radio Broadcasting (Part 2): Dutch Radio Pioneers Hanso Idzerda and Jan Corver

https://www.youtube.com/watch?v=3B38sIfwB8k

The Birth of Radio Broadcasting (Part 3): Hanso Idzerda’s PCGG Radio Transmitter. How does it work?

https://www.youtube.com/watch?v=ci4TSbTCBhw