[Antennas] Radials for a sloper antenna - No radials.

[W3HKK at aol.com]

I ve used a pair of quarter wave slopers - one for 40 and  one for 75- with a 
single coax feed .  At two different  qth's.  ....on one 48 ft and one 56 ft. 
high  aluminum tower.  Neither  had radials.  Both towers had three 8 ft 
ground rods and #6 copper ground  wire,
 
Performance was truly  outstanding.  DXCC etc.   The 48 footer seemed to do 
outstanding on 40, while the 56 fter did outstanding  on 75. So tower height 
matters.  Both were mounted at the top of the  tower with a tribander above them 
and were essentially omnidirectional.  And performance was outstanding  
during dx contests, breaking pile  ups on the first call.  Thats not easy on 75 
during a contest. And it did  so consistently. I won high score in my ARRL 
section for single op all band  several times.
 
You will have fun finding resonance.  The length   will vary wildly due to 
interaction, but the antenna will load at 1.1 to 1 at  resonance off a direct 
coax feed when you find the magic length.  Its  usually longer than a quarter 
wavelength.  Use trial and error.  I  didnt have my MFJ antenna analyzer then so 
I made many trips outside to prune  and unprune. Dont cut, just fold back the 
wire til youre finished with  both.
 
I didnt do 160 because my ground didnt allow 132 ft of sloper. 
 
Good luck