[TowerTalk] Hustler 6-BTV installation

Sat Apr 5 15:32:45 EDT 2014

I always use the DXE VFCC Choke. To my knowledge, It has been quite effective. Well worth the dollars spent. 

Best Regards
Dan Schaaf

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K3ZXL www.k3zxl.com
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From: Dan Hearn 
Sent: Saturday, April 05, 2014 3:11 PM
To: Dan Schaaf 
Cc: towertalk reflector 
Subject: Re: [TowerTalk] Hustler 6-BTV installation

I have a discussion of the 43 ft vertical on our club website www.sdxa.org  Click Articals  to see it. In addition, I think it is not often realized that the coax feedline outer shield acts as one of the radials going into your station unless you use an effective line choke on the feedline where it leaves the radial field edge. Not only that, the noise in your station from wallwarts and other things will be conducted out to your vertical system. It would be wise to use a line choke where the vertical feed line leaves your station

  Applying a few ferrrite beads will help but much better results will be obtained if you build high quality chokes as described on K9YC web site using multiple turns (square law applies to turns thru the core). I have built many chokes of this type and measured their performance with my equipment confirming his results. 

  If you would rather buy such chokes, check out Balun Designs. If you build your own, you can see excellent pictures there. 

I have not dealt with them so you might want to check them out at eham.net

Dan, N5AR

On Sat, Apr 5, 2014 at 11:32 AM, Dan Schaaf <dan-schaaf at att.net> wrote:

  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

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  K3ZXL www.k3zxl.com
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  -----Original Message----- From: Matthew King
  Sent: Friday, April 04, 2014 8:22 PM
  To: TowerTalk at 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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-- 
Dan Hearn
N5AR

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