Michael Carden kindly gave a talk at BonkersCon about the origins of radio at my request. Tim Ansell was there during the day to record these videos with his bonkers home brew video capture hardware.
Sorry about the sound quality at the end of the video. We had some issues on the day with the radio mics, so these videos were recorded with a conference microphone which did admirably as long as the speaker was facing in the right direction.
There are a few of these videos that I’ll post in the next little while as I have time to make sure the recording worked out (by watching the video).