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Old 25-Feb-2017, 3:05 PM   #3
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,747
Quote:
Originally Posted by nomorecomcast
]WOW your and artist. very nice diagram. i got may antenna from from http://users.wfu.edu/matthews/misc/dipole.html How do you get 5540? thank you again for you time.
Thank you for your kind words. I like to do a diagram; it's much better than words.

The 5540 is just to convert the feet formula for a half-wave dipole to inches.

468/57 = 8.21 feet = 98.5 inches

But I have found by experiment that is a little too long for VHF and UHF because of the end effect and length to diameter ratio of the conductor. "Fatter" conductors don't need to be as long for the same resonant frequency.
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Last edited by rabbit73; 25-Feb-2017 at 3:23 PM.
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