Quote Originally Posted by N8YX View Post
I have an Imax up here; around 30ft at the base.

It has a homebrew radial kit - 3 bundles; 4 radials per. They're cut for 28.500, 27.200, 24.950 and 21.300. The 11M segment actually resonates around 26.700 as measured with an analyzer; Ch1 SWR is 1.7:1. I suspect a bit of tuning will help here. 10M resonates higher up the band (ditto tuning) and 12 and 15M are close to unity where I usually operate. Additionally, a choke balun was installed at the feedpoint.

The current 10M station is an IC-751A/R-71A/R-70 ensemble with either an AT-100 or AT-500 auto-tuner handling matching duties. I can also switch the antenna to the FT-102 station and operate 10M with it if desired. Neither the Icom nor Yaesu tuners have a problem bringing SWR to 1:1 so this tells me the impedance characteristics are well within specs. One day I'll sweep the thing with my antenna analyzer and post the results across the four bands of interest.

Many (a rather large percentage) of the local 10M Gang use this particular antenna for our net operations. The most power I'll put into mine is ~200w PEP (from the barefoot FT-102) and it's held together for years. It gets great reports as compared to some of my other 10M antennas, though some day I hope to have a Pro-67 or TH11DX in the air for DX.
What's involved in creating those radials? I really should add some to my A 99, although it works pretty well as is.