I installed a 6 BTV with 45 radials and needed to adjust the 15 meter trap
calibration. Was easy according to DXE instructions. I found it's
performance to be quite good compared to my HyGain AV-640 which performs
really well. In A/B tests, I saw little difference.
From things that I have read, the 43 ft vertical has different takeoff angle
depending on band since in some cases it is 1/4 wave long and in other cases
it is not. Whereas the band resonant BTV should be consistent in takeoff
angles for each band since each band is tuned as a 1/4 wave .
I was able to work some long haul DX such as Bangladesh during long path
conditions on 40 CW. The only problem is that on the lower bands like 40 and
80, it has a very narrow bandwidth, so you must pick a band segment of
interest and adjust it's length for that segment.
Ultimately, I built my own vertical which is 69 ft tall and covers 80, 60,
40 meters and 160 with base tuning and a 60 meter trap. 40 meters ends up
being 1/2 wavelength and the other bands are 1/4 wavelength.
Best Regards
Dan Schaaf
=================================
K3ZXL www.k3zxl.com
=================================
-----Original Message-----
From: Matthew King
Sent: Friday, April 04, 2014 8:22 PM
To: TowerTalk@contesting.com
Subject: Re: [TowerTalk] Hustler 6-BTV installation
Hi, Phil - I found on my installation of a 6-BTV that trap tuning was
necessary to get the best tuning over my 45 radial field.
I used a bulkhead for some time until I installed a DX Engineering choke in
an effort to knock out some RF in the shack. I've come to the conclusion
that I'm just at the edge of the near field since the choke made little
difference on 10m. Point being, I guess it's really up to you and your
particular installation as to install the beads or not. It cannot hurt
from my somewhat limited understanding, and may very well help.
Might I ask why you've decided to switch to a shorter, trapped vertical
rather than the 43' vertical? Also, did you have a tuner at the base of
the 43' antenna?
Take care,
Matt King
KK4CPS
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