Topband: Shunt-Fed tower how-to Video

[Roger Cooke]

Jut watched this video. It's given me added incentive to re-install my 
gamma wire again! It fell down last winter. so, that's another project, 
after re-ropi g my tower.

Very impressed with the presentation Steve.

Many thanks for making it.

I am the Prog Sec for the Norfolk ARC and wonder if you would be 
interested in giving a talk to our club members next year? I arrange a 
lot of these using Skype. We have quite a good set-up for that and have 
about 160 members. Wemeet on a Wednesday evening from 1930 until 2100. 
If you are willing, I will let you have a selection of dates to choose from.

73 de Roger, G3LDI.

On 25/04/2019 10:16, John Chappell G3XRJ wrote:
>
> Steve,
>
> That's an excellent video.
> Both in the technique of shunt feeding and the overall video 
> presentation which sets the bar.
> Most impressive.
> 73
>
> John G3XRJ
>> This week I added a second gamma-wire to my shunt fed tower for 160m 
>> in order to lower the reactance and therefore lower the voltage 
>> across my matching network.  This winter I was having some flash-over 
>> problems.
>>
>> While doing this work I decided to make a video that explains the 
>> method for finding the 50 Ohm point on a tower, and the effect that 
>> wire diameter has on the SWR bandwidth and reactance at the 
>> feedpoint.  I show how I use both the AIM-4170b and the AR 55 zoom 
>> analyzers.
>>
>> I wanted to post the link to the video here on the reflector because 
>> over the years there have been a few questions about how to 
>> shunt-feed a tower, and this might answer some practical questions 
>> about how to go about it.  Maybe someone has a summer project in mind 
>> to turn their tower into a TX antenna?
>>
>> https://youtu.be/cHlc5MTGTFM <https://youtu.be/cHlc5MTGTFM>
>>
>> 73, de steve ve6wz.
>>
>
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