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rveighta(at)earthlink.net
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 Posted: Mon Sep 22, 2008 2:52 pm Post subject: Radio Problem |
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Guys, I have an Apollo SL-30 in my RV-8 which has a rather unique (to me anyway) problem; on the ground, even with the engine running at high rpm, the radio works flawlessly, in the air it's a different story. As soon as I take off, a loud background noise begins which makes receiving transmissions nearly impossible. Usually, sometime during the flight, this noise goes away and the reception is crystal clear!
I have a belly mounted Comant bent whip antenna. Coax connections are tight. Any ideas of what the problem is?
Walt Shipley
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krhooper(at)gmail.com
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| Posted: Mon Sep 22, 2008 3:40 pm Post subject: Radio Problem |
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Walt, try disconnecting your ELT antennae. I had a situation once where the ELT would receive an AM band broadcast and then generate a signal that would make reception of com transmission unintelligible. This would happen on the low end of the VHF band.
Changing the ELT antennae cured my problem.
Hope this helps.
Randy Hooper
On Mon, Sep 22, 2008 at 5:51 PM, rveighta <rveighta(at)earthlink.net (rveighta(at)earthlink.net)> wrote:
[quote]--> RV-List message posted by: rveighta <rveighta(at)earthlink.net (rveighta(at)earthlink.net)>
Guys, I have an Apollo SL-30 in my RV-8 which has a rather unique (to me anyway) problem; on the ground, even with the engine running at high rpm, the radio works flawlessly, in the air it's a different story. As soon as I take off, a loud background noise begins which makes receiving transmissions nearly impossible. Usually, sometime during the flight, this noise goes away and the reception is crystal clear!
[quote][b]
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acepilot(at)bloomer.net
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| Posted: Mon Sep 22, 2008 4:17 pm Post subject: Radio Problem |
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It might be static buildup as you are flying along. In the Air Force,
our planes had "static wicks" on the trailing edge of the wings and tail
surfaces to dissipate the charge buildup....
Scott
rveighta wrote:
| Quote: |
Guys, I have an Apollo SL-30 in my RV-8 which has a rather unique (to me anyway) problem; on the ground, even with the engine running at high rpm, the radio works flawlessly, in the air it's a different story. As soon as I take off, a loud background noise begins which makes receiving transmissions nearly impossible. Usually, sometime during the flight, this noise goes away and the reception is crystal clear!
I have a belly mounted Comant bent whip antenna. Coax connections are tight. Any ideas of what the problem is?
Walt Shipley
|
--
Scott
http://corbenflyer.tripod.com/
Flying Corben Junior Ace - Building RV-4
Gotta Fly or Gonna Die
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rv6n(at)optonline.net
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| Posted: Mon Sep 22, 2008 5:33 pm Post subject: Radio Problem |
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Walt C
6nbsp;
I have a similar problem with my SL40 C same antenna 6nbsp;too E 6nbsp; Unfortunately the background noise does not clear up after a while for me like your 7s does E 6nbsp; Garmin 6nbsp;said it was probably due to static build-up during flight but I have not figured out how to eliminate it E 6nbsp; If you figure this out please let me know too E 6nbsp; My problem is mostly related with the intercom C not the com E 6nbsp; I have a rubber duck antenna 6nbsp;on my ELT 6nbsp;from my hand-held nav-com E
6nbsp;
There must be a way to fix this without adding static wicks E
6nbsp;
Bob
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Jerry Grimmonpre'
Joined: 09 Jan 2006
Posts: 144
Location: Huntley, Illinois 60142
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| Posted: Mon Sep 22, 2008 6:44 pm Post subject: Radio Problem |
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Walt ... you could run this by the Aeroelectric List at aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com) and Bob Nuckolls could suggest some things to try.
Bob is very good at finding the mysteries of black art. Let us know what happens. Good luck, Jerry
| Quote: | Guys, I have an Apollo SL-30 in my RV-8 which has a rather
unique (to me anyway) problem; on the ground, even with the
engine running at high rpm, the radio works flawlessly, in the
air it's a different story. As soon as I take off, a loud
background noise begins which makes receiving transmissions
nearly impossible. Usually, sometime during the flight, this
noise goes away and the reception is crystal clear!
I have a belly mounted Comant bent whip antenna. Coax
connections are tight. Any ideas of what the problem is?
Walt Shipley
|
[quote][b]
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http://www.matronics.com/Navigator?RV-List |
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robertrv607(at)yahoo.com
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| Posted: Tue Sep 23, 2008 11:32 am Post subject: Radio Problem |
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Walt: I have kind of same problem, untill I discovered it was the way I control
the Intercom...I had it too much to the noise side....play with the Intercom,
next time you are flying, ( ofcurse, in non congested area OK?)
It worked for me now no more noise on radio.....
robert
--- On Mon, 9/22/08, Jerry Grimmonpre <jerry(at)mc.net> wrote:
| Quote: | From: Jerry Grimmonpre <jerry(at)mc.net>
Subject: Re: Radio Problem
To: rv-list(at)matronics.com
Date: Monday, September 22, 2008, 10:44 PM
Walt ... you could run this by the Aeroelectric List at aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com) and Bob Nuckolls could suggest some things to try.
Bob is very good at finding the mysteries of black art. Let us know what happens. Good luck, Jerry
| Quote: | Guys, I have an Apollo SL-30 in my RV-8 which has a rather
unique (to me anyway) problem; on the ground, even with the
engine running at high rpm, the radio works flawlessly, in the
air it's a different story. As soon as I take off, a loud
background noise begins which makes receiving transmissions
nearly impossible. Usually, sometime during the flight, this
noise goes away and the reception is crystal clear!
I have a belly mounted Comant bent whip antenna. Coax
connections are tight. Any ideas of what the problem is?
Walt Shipley
|
|
[quote][b]
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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