I am designing a 2 element 40 meter yagi in the spirit of the Force 12 N
element yagi's. The goal is not to be less than full size, the goal is to
avoid unwanted interactions with a near-by (13' down the mast) tri-bander.
Rather than using linear loading, I am using capacity hats to load the
elements.
The question is, how far do I need to move the '21 mhz' resonance to avoid
interactions with 15 meters? I currently have the antenna set up so that
the secondary resonance near 15 meters occurs at 22.800 mhz. The antenna is
62 ohms - j130 at 21.450. Is that good enough? I assume that it is, but
any thoughts would be helpful...
Yes - this is yet another question related to my Boonville project :-)
Thanks!
***dan, K6IF
List Sponsor: Are you thinking about installing a tower this summer? Call us
for information on our fabulous Trylon Titan self-supporting towers - up to
96-feet for less than $2000! at 888-833-3104 <A
HREF="http://www.ChampionRadio.com">
www.ChampionRadio.com</A>
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|