A quick question to the antenna modeling gurus here - I am preparing to
clean-up and rebuild some 144 Mhz M2 2M12 yagis. I have recently relocated to a
more rural QTH and am concerned about larger birds getting on my yagis. The
towers are in the 130' height range. I am studying changing out my parasitic
elements from 3/16" to 1/4" rod. I plan to use the correction as detailed in
the ARRL Antenna Handbook 22nd edition for the K1FO/DL6WU high performance 144
Mhz yagis section 15.3.5 page 15-27. Since 1/4" rod parasitic elements are used
in the 144 Mhz designs it is stated that the element lengths need to be
lengthened by 3mm if 3/16" elements are substituted. So, my thinking is to
replace my 3/16" parasitic elements with 1/4" ones that are 3mm shorter in
length. As far as my knowledge goes I should not be detrimentally affecting the
antenna (electrically) in any way, but I thought I would ask. Thanks, Byron
W5FH
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