Topband: Phased beverages

[w4pv]

Hello,

I have installed 2 parallel beverages each approximately 520 ft long, spaced 
421 ft apart (using available trees, etc for support). According to ON4UN's 
book this spacing might not be the best. Should I try and get the spacing 
down to between 350 - 375 ft and what difference would I notice with this 
change?

Thanks to all who answered my first e-mail.

Patrick, W4PV