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Author Topic: sailboat antenna  (Read 2061 times)
VE7LKS
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Posts: 2




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« on: April 23, 2005, 10:21:12 PM »

Greetings,
I have a Yaesu FT847 and a AT 100 Pro tuner. I am currently using an insulated backstay on the sailboat.  It tunes up on 20M but is not doing so well on 40 and 80 meters.  I am thinking of constructing a separate antenna that can be hoisted and used for the other bands.  Does anyone have experience or a good design for my needs.  I have 50 feet of vertical elevation to play with and would like to know what has worked for others?  A Dipole or inverted V or a long wire or what?  Any help or ideas would be appreciated.  The boat is fiberglass with an encapsulated iron keel.  I presently have installed about 100 square feet of copper for a ground plane.
Thanks,73
Steve
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K0BG
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Posts: 10248


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« Reply #1 on: April 24, 2005, 06:22:31 AM »

I have installed an Icom 706 and an AH-4 installed on a 45 foot cat for a good friend of mine. I used the starboard mainstay for the antenna. The stay itself is just over 60 feet, and the AH-4 will tune it from the top of 160 through 6 meters. The AT100 doesn't have the range for this type of operation.

Alan, KØBG
www.k0bg.com
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KA2ZSD
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Posts: 1




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« Reply #2 on: April 22, 2017, 05:51:33 PM »

I live in Sitka Alaska on 41 foot Islander ,,

what nice HF radio thinking of old Drake TR-7 ,

Or new small HF-6M-2M-440 RADIO like Icom 706 or Kenwood TS 480HX ,,good heavy wire type antenna, need help


Joe   
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KC2MMI
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Posts: 808




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« Reply #3 on: May 05, 2017, 05:49:41 PM »

Steve-
 The uniform response from sailing hams and the ARRL (including their antenna books) and the marine radio industry, is that no two boats are alike. Even sister ships with consecutive serial numbers, because of the number of connections in the rigging and variations in it. Even Gordon West will tell you there is no one fast answer.
 If you want to erect a vertical on the stern rail, that's certainly predictable and clear is all the other possible interactions. But the consensus is that you are best off by making up some alligator clips and trying other parts of your rigging, or feeding at other points, with some measuring and educated guesses, first.
 The counterpoise should certainly be sufficient. And (rashly) presumably the setup of the tuner, etc. is by the book. So look around, run some numbers, maybe something else works out. Some folks do raise an insulated wire alongside the shrouds, but even then you've got some question of how the shrouds and rigging may interact.
 No fast alternative that is guaranteed to outperform the backstay, except a big stick on the stern rail.
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