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chemeagle(at)verizon.net
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 Posted: Mon Aug 08, 2011 3:23 pm Post subject: Antenna ground plane and nearby cables |
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I have a composite aircraft (Glastar) with batteries in tailcone. #2 cables run to the starter and a #8 wire from the alternator run along a channel through the baggage compartment. I want to install a quarter wave antenna (and associated ground plane) right underneath all those cables.
Is this a stupid thing to do?
Scott
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nuckolls.bob(at)aeroelect
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| Posted: Tue Aug 09, 2011 5:34 am Post subject: Antenna ground plane and nearby cables |
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At 06:19 PM 8/8/2011, you wrote:
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I have a composite aircraft (Glastar) with batteries
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two batteries? Why so many in this
class airplane?
| Quote: | . . . in tailcone. #2 cables run to the starter and
a #8 wire from the alternator
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Alternator feed wire would normally
not run in this bundle. You can tie
it to the starter contactor under
the cowl.
| Quote: | . . . run along a channel through the baggage compartment.
I want to install a quarter wave antenna (and associated
ground plane) right underneath all those cables.
Is this a stupid thing to do?
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No, antennas on the outside of the airplane
sitting on an existing groundplane (skin
or tubular structure) or manufactured ground-
plane are not influenced by adjacent wires
on the other side of the groundplane.
Bob . . .
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jonlaury
Joined: 06 Nov 2006
Posts: 336
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| Posted: Wed Aug 10, 2011 6:15 am Post subject: Re: Antenna ground plane and nearby cables |
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| Quote: | No, antennas on the outside of the airplane
sitting on an existing groundplane (skin
or tubular structure) or manufactured ground-
plane are not influenced by adjacent wires
on the other side of the groundplane.
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Bob, I mounted my xpdr antenna on a 6" diameter ground plane inside my composite plane. The tail strobe wire is about 12" away from the antenna. Would you expect problems with this installation?
John
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