[TowerTalk] Antenna Launcher

[Jim W7RY]

Here is a great info page on launchers!

http://www.antennalaunchers.com/the_rest_of_the_story.html

73
Jim W7RY


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From: "larryjspammenot at teleport.com" <larryj at teleport.com>
Sent: Sunday, December 25, 2011 7:37 PM
To: <TOWERTALK at contesting.com>
Subject: Re: [TowerTalk] Antenna Launcher

> One of our local radio clubs has built some of the compressed air/tennis 
> ball launchers to sell at ham swap meets over the last year or so, as a 
> club fundraiser. They've been well received - I bought one, and am 
> planning to try it out, launching a line over some of my tall fir trees.
>
> Does anyone have any recommended brand-names for the "braided 
> kevlar/spectra fishing line" to use with one of these launchers?
>
> LJ
>
>
>
>
>
> -----Original Message-----
>>From: Kevin Normoyle <knormoyle at surfnetusa.com>
>>Sent: Dec 25, 2011 10:35 PM
>>To: TOWERTALK at contesting.com
>>Subject: Re: [TowerTalk] Antenna Launcher
>>
>>a well designed antenna launcher is great. A bad one is frustrating
>>(intermittent, non-consistent launch).
>>
>>There's a huge difference between a home brewed one, and one from a 
>>purchased
>>kit that has seen experimental testing and development.
>>(unless you just copy an existing good design)
>>I'm not kidding: I've done both. The valve mechanism is critical, as well 
>>as
>>sizing of the reserve and barrel.
>>
>>I just use spinning reel with half a fishing pole, held by someone else, 
>>for the
>>line. (make sure spinning reel is big enough for the amount of line..small 
>>reels
>>common today)
>>
>>But the biggest thing nowadays, is to use braided kevlar/spectra fishing 
>>line
>>for the launch, not monofilament.
>>
>>Gives better height, and is SO much easier to deal with. It's worth the 
>>cost,
>>definitely. There's a number of different brands.
>>also, for equivalent diameter to monofilament, it's much stronger. The 
>>woven
>>line doesn't tangle like mono.
>>
>>I can get +-8 feet sideways accuracy at the top of 125' trees, with a 
>>vertical
>>enough launch so it doesn't hang up in other trees.
>>
>>-kevin
>>ad6z
>>
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