On Apr 1, 6:57*am, Cecil Moore wrote:
I don't see any advantage for the 1/2WL
helical over the 1/4WL helical except for the elevated current maximum
point which may require a less robust radial system.

I just modeled the 1/4WL helical vs the 1/2WL helical with 4 elevated
radials and copper wire losses. The 1/2WL helical gain is 1.23 dB
higher than the 1/4WL helical gain and the TOA is 2 degrees lower for
the 1/2WL version.
--
73, Cecil, w5dxp.com