You're not in Florida I take it?
Best regards - Brian Carling
AF4K
> On Feb 26, 2015, at 5:49 PM, Don <w7wll@arrl.net> wrote:
>
> I have a TH7DXS at 72 and and a A3WS at 78 feet. With 80 MPH gusts and
> sustained winds often in the 50's and 60's during the winter here on the
> ocean the elements move around a lot - have not had one break or bend yet in
> the 13 years they've been up.
>
> Don W7WLL
>
>
>
> -----Original Message----- From: john@kk9a.com
> Sent: Thursday, February 26, 2015 2:14 PM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Mosley Antenna Question
>
> Interesting information Jim. If I were in the market for a tribander I
> would definitely buy the K7LXC report. One potential problem with
> interlaced beans is that there appears to be little room for side mounting
> them on a tower. I also wonder what happens when they are used in a windy
> environment and the closely spaced element move around.
>
> John KK9A
>
>
> [TowerTalk] Mosley Antenna Question
> from [Jim Thomson] [Permanent Link][Original]
> To: <towertalk@contesting.com>
> Subject: [TowerTalk] Mosley Antenna Question
> From: "Jim Thomson" <jim.thom@telus.net>
> Date: Thu, 26 Feb 2015 07:32:51 -0800
> List-post:
> 73, Jim K9YC
>
>
> ## heres the latest from F12. 20-15-10 all on barely a 10 ft boom.
> http://www.force12inc.com/products/xr3-compact-6-element-20m-15m-10m-multi-mono-contest-yagi.html
>
> ## heres the latest and greatest..with booms shrunk by 30%. The old C3,
> xr5
> etc line up has been upgraded to the newer format.
> http://www.force12inc.com/categories/beam-antennas/all-new-xr-series-multi-mono-hf-yagi-beams.html?sort=pricedesc
>
> ## BTW, I see n6bt wrote an entire section on trapped yagis in his book,
> array of light. . Turns out I was correct. By encasing the coils with AL
> tube, the coil Q drops down to just 20-30.
> feed Z rises to close to 50 ohms..cuz of the excessive losses by the high esr
> of the low q coils. He mentioned that one maker of trapped verticals
> used a
> ceramic core to wind the coils on,
> so it would handle the extreme temps.
>
> ## He also mentioned about HF yagis using the T match...and the 200:50 ohm
> coax balun. Several of them had the main lobe canted off to one side by 20
> degs ! The fix was to replace the T
> match with a conventional hairpin setup. He did not mention the brand, but I
> suspect it was telrex... the only co I know of that used a T match. Why the
> lobe ended up skewed 20 degs to one
> side is beyond me. He mentions fixing several of them.
>
>
>
> Jim VE7RF
>
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