[Antennas] Balun

[TonyG70747@aol.com]

Yes, I replaced my home made choke balun with a commercial balun on my A3S.
The only difference I noted was a small shift in minimum SWR frequency on 10 
meters. It was slightly lower in frequency due to somewhat longer wires from 
the commercial balun mounted on top of the boom.
Pattern wise there was no difference on any of the bands. I can say this with 
conviction as I created a computer program to capture the antenna pattern 
using both nearby stations broadcasting a steady signal and those off the air 
without their knowledge.
The home built choke and commercial balun overlaid exactly. The reason I did 
this was that the beam pattern had a nonsymetrical lobe in the reverse 
direction. I thought that it may have been due to insufficient choke action allowing 
the feed cable to interact with the antenna.
You can see some of my A3S patterns on http://hometown.aol.com/azantennas.

73 Tony K6AIA



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