[TowerTalk] HyGain 204BA mod

Jim Brown jim at audiosystemsgroup.com
Fri Sep 6 19:16:56 EDT 2024


Hi Yuri,

The main thing you are doing wrong is studying only SWR, the variable 
that matters the least, and ignoring gain and pattern as it changes over 
the band, which is why we have beams in the first place. YW allows us to 
study that (although we've got to study pattern by changing frequency). 
Don't even bother with matching until you've optimized the pattern for 
what you want!

I'm on the west coast, so I care only about forward gain over the entire 
band, don't care about front to back. Being in the east, you may be more 
interested in F/B.

73, Jim K9YC

On 9/6/2024 11:22 AM, Yuri wrote:
> What am I doing wrong? Should I use original hairpin rod spacing of 6"?
> Old variant of this antenna was wider (better broadband)
> Any advise would be greatly appreciated.




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