Reply to thread

I have seen w8ji add radials to a j-pole but only say that a sigma would benefit,

i don't know what made Henry add radials nor do i know how he came up with the graphs for signals at 30 kilometers from the transmitter, i am pretty sure its not extra gain,

i do recall Henry saying something about the open sleeve article not been the same as the sigma because the open sleeve has a ground-plane where the sigma does not,

i have been wondering for many years if radials would benefit a sigma style antenna,

if they work you have to weigh up the pros & cons,

adding 4 x 1/4wave radials to a vector significantly increases the real estate for birds to shit from, 30" > 17+ foot,

That's not the extra coverage im looking for.