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haribole
Joined: 21 Feb 2014
Posts: 33
Location: United States
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 Posted: Wed Sep 23, 2015 8:12 am Post subject: Active VOR antenna |
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Hi Bob
Will this antenna design work on an all metal plane? A fiberglass wingtip is used though.
Thanks
Hari
On Wed, Sep 9, 2015 at 10:26 AM, <berkut13(at)berkut13.com (berkut13(at)berkut13.com)> wrote:
| Quote: |
VOR antenna project update:
I want to extend a big THANK YOU to all that helped with this project and tell you it was a complete success!
We have been progressing through Phase I testing and the non-standard VOL/ILS antenna design is working splendidly. It is being used with a Garmin 650 (internal splitter) and locks onto VOR signals from 100mi (at) 10,000’ and has no problem at all with ILS capture either. It was made from RG-58 coax and a short scrap of 22-AWG wire for the counterpoise per the dimensions below.
We are very pleased with it’s performance and can’t imagine that a standard antenna would perform any better in this application. Testing will continue to determine if there are any blind or degraded spots or freqs. But for now, mark it up as a successful alternate design!
Thanks again!
-James
Berkut/Race 13
From: Robert L. Nuckolls, III (nuckolls.bob(at)aeroelectric.com)
Sent: Thursday, June 04, 2015 5:26 PM
To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com)
Subject: Re: Active VOR antenna
Jim, finished one of these and was disappointed in performance.
The thing is so tiny that it's hard to troubleshoot,
assembled a second just in case.
I think the best plan-b for now is to install
a quasi-sleeve dipole . . . except that the 'sleeve'
is just a piece of wire. I forget how long you said
your antenna conduit was, hopefully considerably
more than 26".
Make the antenna from wire stiff enough to push
into the tube on the end of the coax. Wouldn't
put a connector in the counterpoise. Just thread
it to the ship's interior on installation and tape
it sort out of the way.
[img]cid:5C64B38EE92841F288FADEB2A490930B(at)DEFIANT2600[/img]
I've got a couple other antenna projects on the bench
but some buys waving credit cards have purchased some
keyboard/hammer-n-tongs time . . . and I've got a couple
of pots boiling for B&C. I'd like to pursue the
active antenna experiment. It would be useful to field
test the idea in close proximity to transponder and
vhf/comm transmitters!
In the mean time, let's get your airplane flying.
Bob . . .
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nuckolls.bob(at)aeroelect
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| Posted: Wed Sep 23, 2015 8:58 am Post subject: Active VOR antenna |
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At 11:10 AM 9/23/2015, you wrote:
| Quote: | Hi Bob
Will this antenna design work on an all metal plane? A fiberglass wingtip is used though. |
No . . . suggest you consider a VOR tip antenna like
this . . . http://tinyurl.com/qc9qyla
Bob . . . [quote][b]
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