[TowerTalk] Elevated vertical

[Tom Osborne]

Hi All

I just put up an elevated 40 meter vertical.  The feedpoint is around 15 
feet or so up and I have 8 radials on it right now.  I cut the radials the 
same length of the vertical section.  I have a coil of around 8 turns of 
coax for a choke.

It works good, as the first day I put it up, I worked some Europeans from 
here in Oregon.

The thing that seems strange is that at the low end of 40, the SWR is around 
1.3:1.  As I go up the band, it goes up to about 1.5:1, then when I get to 
the top of the band, it goes back down to 1.2:1.
Is that because some of the radials are resonating at different parts of the 
band??  73

Tom W7WHY