This recording was made while presenting the attached PDF file and presented to the Tonto Amateur Radio Association on May 13, 2023 at their monthly meeting.
Incidentally, the BBTD I built was invented by Bonnie Crystal KQ6XA.
Here is the link to the page I use to come up with End Fed “Random” Wire lengths: https://udel.edu/~mm/ham/randomWire/
Here is a Link to the PDF https://n7tar.org/wp-content/uploads/2023/05/Presentation.pdf
And here is the video. I hope it makes you want to go and do your own experiments!