A dipole antenna is most efficient when the ends are at 180 degrees from one another. Hams use an antenna called an inverted V to get the antenna to fit in their backyards.
Folding the antenna this way will affect its perfoamance some but not a lot. The closer you bring the ends together the more inefficient the antenna will become. But a 90 degree seperation is acceptable, you may have to retune it slightly to optimize its performance, but this should be no big deal. Type 'inverted V antenna's' into your search engine and you'll see plenty of theory as well as actual use info on this type of radiator. Denny ... The Lurker! "Dene Collett (SA)" <[email protected]> wrote: Hi guys Thanks to those that replied to my query regarding the Microair radio--much appreciated. my next question is about the antennae. I will be using a dipole as described in my last post but was wondering what effect mounting the leg that the screen of the co-ax is soldered to horizontally will have over mounting it 180deg opposed to the driven element. I know one of the replies described an installation like this but I would like to know what the theoretical difference is since I have the space to mount it either way. I have a book titled "understanding and repairing CB radios" by Lou Franklin in which a chapter deals with various different types of antennae but only shows the dipole 180deg opposed. One good tip it gives is to use 10-12 turns of the co-ax feeder wrapped in a coil about 6"-8" (for CB freq I would imagine) just before the antennae. Has the same effect as the "balun" used in Mark L's install but I guess it weighs ten times as much also. The dimensions for the Microair M760 are on the Spruce websight but I can't seem to find dimensions for the transponder(depth behind panel), Anyone. Dene Collett KR2S-RT builder Port Elizabeth South Africa mailto: [email protected] P.S: checkout www.whisperaircraft.com _______________________________________ to UNsubscribe from KRnet, send a message to [email protected] please see other KRnet info at http://www.krnet.org/info.html --------------------------------- Do you Yahoo!? Win a $20,000 Career Makeover at Yahoo! HotJobs
