Harold E. Johnson wrote:

I made an antenna for WWVB, and also use it for NAA at 24 KHz
by adding an additional cap across it for resonance down there. It's better
heads and shoulders than any ferrite antenna I ever made. 24 inch bicycle
wheel,...

Please consider photographing this device from a number of angles,
annotating the images with construction data, and making the results
available. I am very interested.

Regards,

Michael