[TowerTalk] Shunt-Fed tower how-to Video

Mpridesti mpridesti at yahoo.com
Thu Apr 25 06:37:18 EDT 2019


Steve


Nice job with the video. Having built plenty of shunt fed (gamma match) systems, I found your info confirming very nicely all of my “cut and tried” methods with the added advantage of using much nicer tools. 

I own the AA-55 Zoom as well and love it for this kind of work. 

Thanks again!

Regards,

Mark, K1RX


> On Apr 24, 2019, at 10:23 PM, VE6WZ_Steve <ve6wz at shaw.ca> wrote:
> 
> 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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