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Hopperdhh(at)aol.com
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 Posted: Sat Mar 04, 2006 5:28 pm Post subject: VOR antenna option -- was New Guy Questions |
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I have had excellent results with a homemade VOR antenna fastened to my
canopy (on the inside!) with small suction cups. These are available for hanging
doodads on windows, etc. Actually, I started with black electrical tape,
but the suction cups look more -- er -- professional. I used an MFJ-259B
Antenna Analyzer to trim the dipole for lowest SWR in the middle of the VOR band,
and the wires measure 22 inches on each side. My plane is an RV-7A slider
and the feed line comes up the baggage bulkhead and forward with a loop to
allow the canopy to travel. The antenna wires are just number 22 white insulated
aircraft wire which go outboard and then forward using 2 suction cups on
each side for support. This puts the antenna mostly above the baggage
compartment, with the ends just above and behind the pilot's and co-pilot's head. It
may look a little dorky, but the performance is excellent and it costs
practically nothing. I intend to put some ferrite chokes at the feed point to make
it perfectly horizontally polarized, but it works fine with just the center
conductor of the RG-58 going to one side and the ground going to the other
side. It was originally intended to be temporary, but has become somewhat
permanent. Please don't laugh!
Dan Hopper
RV-7A Flying since July 2004 -- 144 hours
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Jerry Grimmonpre'
Joined: 09 Jan 2006
Posts: 144
Location: Huntley, Illinois 60142
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| Posted: Sat Mar 04, 2006 6:08 pm Post subject: VOR antenna option -- was New Guy Questions |
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Dan ....
I'm not laughing ... fact is I'd like to have one like this too. Can you
send a picture? I know nothing about ferrite chokes and all that stuff but
can learn. Thanks for sharing.
Jerry Grimmonpre'
RV8A Huntley IL
Do NOT ARCHIVE
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