AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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 Posted: Sat Sep 15, 2007 1:59 pm Post subject: Antenna placement and adequate ground plane or ground wire |
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I will be patient. I think this kind of discussion is of value. Thanks
John C.
40600
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Rick Sked
Sent: Saturday, September 15, 2007 2:28 PM
To: rv10-list(at)matronics.com
Subject: Re: Antenna placement and adequate ground plane or ground wire termination
I just stuck em where they look cool....lol, I pretty much followed the placement by several builders, the location of my remote transponder led to that antenna located aft of the baggage compartment on the bottom right near the elevator bellcrank. Com 1 is on the right bottom, near the rear seats. GPS and GDL-69A antennas aft of the cabin top on the upper rear skin. Com 2 is an Archer in the right tip along with the MKR BCN made from stripped RG-400 wire, Nav is an Archer in the left tip. I powered the panel the other night the both COM's recieved very well but I'm inside the KVGT's class D space at my house, didn't try to transmit. I was too busy looking for smoke and playing with all the whistles and bells. I used a heat gun to warm the cylinders, EGT and CHT started to show a rise from the 92 degress in the garage to about 110 before I stopped warming the cylinders, MAP was holding a steady reading so far it looks OK. Thankfully all seemed to be working as advertised. I could not tell you about the NAV antenna cause the wings are in the hangar and I could not plug them in to see how it was working.....I have only done continuity, short to ground and checked the trim and lights on the wings, no real ops testing there yet....give me about three months 
Rick S.
40185
----- Original Message -----
From: "John W. Cox" <johnwcox(at)pacificnw.com>
To: rv10-list(at)matronics.com
Sent: Saturday, September 15, 2007 11:13:58 AM (GMT-0800) America/Los_Angeles
Subject: Antenna placement and adequate ground plane or ground wire termination
Much of the consternation in finalizing RV-10 kit completion is the delay in choice of avionics, the choice of antenna, selecting antenna placement, and then final ground strapping/ground plane/ ground wire lug. No one is saying that the purchase of avionics needs to be done any too early. That is a lot of money $$$, but the choice should drive the choice of antenna. The choice of antenna should drive the location and then the method of attachment. The distance from the mount to the avionics is also important and the best performing wire (both coax and AWG22 power and ground) chosen. Few are even talking about horizontal and vertical polarity. Or ½ wave, 5/8 wave and associated wind load. I know Sausen said it didn’t amount to much but then we just replaced all the antennae that got snapped off recently.
Seems some of the flying veterans should weigh in on how early during the kit completion the antenna mount technique could be (should be) resolved. I am seeing a lot of builds which delays this important choice late into the canopy installation. I remember just one builder presented a spreadsheet/ checkmark matrix as to what, where and why -fairly early on, in his build. Composite canopies can play havoc with those choices. It is humorous that so many VANs builders thing of these as aluminum airplanes. Seems when it comes to antennae, they are more composite in their mount location than most certificated metal aircraft. Make it carbon fiber and its even worse.
Has anyone tried duplicating Archers with copper rather than aluminum (inside the composite wingtip)?
Any takers? Tim’s WSI post got me reflecting… which you all know may not be a good thing. Plus with 1,000 subscribers there are sure a lot of lurkers and I don’t want to lose Michael Sausen’s posts again. Thanks Tim! Maybe some of you can rate your antenna performance and make stronger recommendations to the next 700 builders.
John Cox
#600
W7COX – (Amateur Radio) for those not informed [quote] get=_blank>http://www.matronics.com/Navigator?RV10-Listp://forums.matronics.com [b]
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