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rparigor(at)SUFFOLK.LIB.N
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 Posted: Sat Feb 14, 2009 9:40 pm Post subject: Anyway to test VOR antenna location on ground? |
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I have an AAE antenna for my panel mounted Vertex VX-700 handheld. I made a 1/4" thick balsa 90 degree bracket where half the antenna is horizontal, and half vertical so it will kinda work for both nav and com (supposedly ~ 70% as well for each as compared to mounting with antenna straight in proper orientation)Anyway had strobes going today (Kunzleman that drives two wingtip heads with position LEDs) and found a location where the strobes don't antagonize too much. This places the horizontal portion of the antenna at the top of the fuse going fore and aft parallel with the pitch torque tube ( large OD thin wall aluminium) about 16" away.Any ideas on how I could perhaps test VOR on ground to see if location works reasonable?I tuned to a VOR and was just about able to hear identifier with volume all the way up. No change to reception with antenna out of plane or in position I like with strobe going, I spun plane 360 degrees while listening and there was no change.Thanks.Ron Parigoris [quote][b]
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l_luv2_fly(at)yahoo.com
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| Posted: Sun Feb 15, 2009 8:18 am Post subject: Anyway to test VOR antenna location on ground? |
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Hi Ron,
If I were to do it over again I would put mine in the wing, despite the access issues and the need to have a co axial cable connection in the wing.
I had mine in the floor and I had problems getting the localizer and glideslope. I moved it to the roof and it improved but it wasn't great although I find VOR reception perfect in that location.
Obviously you will want to keep your strobe wires as far away as possible, but as you probably know, the coupling is an inverse relationship, so a little bit of distance buys you a lot.
My strobe is on top of the fin and the wire passes close to my Bob Archer comm antenna with no ill effect.
As to answering your question, no, sorry I don't know of anyway to test the relative merits of locations. I think its one of those things that you ask around on and find out what has worked / not worked for them.
As for me, my airplane is looking less and less like and airplane these days. The engine is out at LEAF (Rotax shop) to split the case and inspect. While the engine is off I am going to remove the flap drive tube as I am installing electric flaps, move the oil tank in preparation for installing the intercooler and I am going to do a phase one of my cooling modifications
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