2 RPM. See: http://www.skywaves.ar88.net/Docs/YE-ZB%20Presentation.pdf Al Klase – N3FRQ Jersey City, NJ http://www.skywaves.ar88.net/ On 11/13/2015 12:35 AM, WA5CAB--- via Milsurplus wrote: > .....On another subject, does anyone know what RPM the YG antenna rotated at? > >