I really like it! it seems to work well anywhere as long as it is 
close to resonant on each of the bands it supports. It definitely 
works well on ten meters and on 12, 17, and I've gotten good signal 
reports on 20 and 40. It does need to be guyed, to keep it from 
flopping around in high winds though it is rated for 60 MPH I 
believe. Mine is mounted on a clothes line pole, have no ground 
radials since it is advertised to work fine without them. One thing, 
when installing, make sure that sections are tightened, and when the 
cold weather sets in, it may get a little loosened, so the sections 
need to be tightened, when the temps go down, particularly the jumper 
straps around the loading coils at the top of the antenna.
Those bands have independent loading coils and capacity hat that are 
connected by a series jumper straps, and if not guyed properly also 
they flop around some, exacerbating the problems. I am truly 
impressed with the antenna.





Curt

W B 6 H E F
Fessenden, North Dakota; 58438-7300

At 10:35 AM 12/10/2011, you wrote:
>Hi;
>I believe someone mentioned they were using the high gain 640.  Finally
>got around to looking at it and looks quite interesting.  Like the fact
>that each band is supposedly tuned independently.  Do you have it ground
>or roof mounted?  How has the band width and performance been?
>
>--
>richard