[TowerTalk] HyGain 204BA mod

[Yuri]

Hello,

I recently modified my old 204BA using the BV204CA file (YW, Yagi for 
Windows by N6BV) from the ARRL Antenna Book.
I moved Driven Element and Director 1, changed the element tip lengths 
where necessary and changed Hairpin match length according calculations.
According to the computer model the calculated SWR is 1.09:1 on the 
resonant frequency of 14175, and 1.40:1 on the edges: 14000 and 14350 at 
the 80' height.
Hairpin spacing that used is 12 inches (different from the original one, 
which was 6 inches).
In reality, I have SWR of 1.05:1 on 14090, which appears to be my new 
resonant FREQ now, and 1.6:1 on 14000 with 2.6 on 14350.
Why is it so narrow?
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.

-- 
73, Yuri VE3DZ