Here's a document on L.B. Cebik's website that has an in-depth study of radials on the ground. L.B. is a SK and now AntenanX requires a registration (free) for access to his information that they are now hosting. There is a huge amount of information on many facets there. http://www.cebik.com/content/gp/gr.html 73, de Jim KG0KP ----- Original Message ----- From: "Deon Erwin ZS1ZL" <zs1zl at telkomsa.net> To: "Reflector Antennas Qth.net" <antennas at mailman.qth.net> Sent: Friday, October 03, 2008 12:29 PM Subject: [Antennas] Radial Formula > I have two questions about calculating the length of radials. >> * Which formula is used for calculating the length of 1/4 wave elevated > radials: 300/f or 246/f ? >> * Which formula is used for calculating the length of 1/4 wave ground > mounted radials (laid on the ground): 300/f or 246/f ? >> Deon ZS1ZL > ______________________________________________________________ > Antennas mailing list > Home: http://mailman.qth.net/mailman/listinfo/antennas > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:Antennas at mailman.qth.net >