[TowerTalk] 80-m. Inverted Vee vs. Dipole Performance

[Tom Osborne]

Hi Bill

With a StepIR on top of a tower, wouldn't it make a difference which band 
the StepIR is tuned for for the sloper to work?

If the top antenna is like a ground plane, it seems as though the lower the 
StepIR is tuned, the better the sloper would work.  If it were tuned to 20, 
it'd have more hardware out there.

Seems like it would be kind of interesting to check the sloper while you 
adjust the StepIR.  73

Tom W7WHY
>
> The half-sloper tunes (more or less) on 160 (about 100 Khz worth) and 
> 80/75
> (about 350 Khz worth).  It also tunes on 40 meters, but is odd on this
> band. The tower has about 30 radials of various lengths. I attribute the
> wide bandwidths of the half sloper to the variety of paths down the tower
> (through the sliding sections, a parallel wire connecting the top and
> bottom, coax coupling, etc) and maybe the less-than-ideal radials.  (There
> is about 50' between the rig and the tower; coax under ground; anything
> less than 3:1 SWR is OK for me.)
>