Today's Message Index:
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1. 04:49 PM - Transponder antenna location (Larry Winger)
2. 05:09 PM - Re: Transponder antenna location (Larry McFarland)
3. 05:11 PM - Re: Transponder antenna location (DaveG601XL)
4. 05:20 PM - Re: Transponder antenna location (Paul Mulwitz)
5. 05:36 PM - Re: Transponder antenna location (Bryan Martin)
6. 09:46 PM - Re: Transponder antenna location (Larry Winger)
Message 1
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| Subject: | Transponder antenna location |
On the 601XL or 650, where have builders placed the transponder antenna?
I'm considering a location on the bottom of the aircraft, just behind the
center spar and under the seat area. The advantages of that location seem
to be a short coax run, minimizing signal loss. The disadvantages might be
shadow effect on the ground.
I would appreciate your thoughts before I drill holes. Thanks.
Larry Winger
Tustin, CA
CH 650B / Corvair
Wiring
Message 2
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| Subject: | Transponder antenna location |
Hi Larry,
I placed my transponder antenna just behind the seats thru the belly and
have had no problems with
transmission or signal. Radio antennae went thru the back top skin and
returns opposite side from the transponder cable. Coaxial signals don't
affect each other this way.
Larry McFarland at www.macsmachine.com
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Larry Winger
Sent: Wednesday, January 18, 2012 6:44 PM
Subject: Zenith-List: Transponder antenna location
On the 601XL or 650, where have builders placed the transponder antenna?
I'm considering a location on the bottom of the aircraft, just behind the
center spar and under the seat area. The advantages of that location seem
to be a short coax run, minimizing signal loss. The disadvantages might be
shadow effect on the ground.
I would appreciate your thoughts before I drill holes. Thanks.
Larry Winger
Tustin, CA
CH 650B / Corvair
Wiring
Message 3
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| Subject: | Re: Transponder antenna location |
Larry,
My transponder antenna is right behind the passenger seat going out the bottom
of the fuselage. No complaints from ATC yet about being able to see me.
--------
David Gallagher
Zodiac 601 XL-B: flying, 200+ hours now
Next project under construction: Aircamper
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=364251#364251
Message 4
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| Subject: | Re: Transponder antenna location |
Hi Larry,
I put mine behind the seats in the middle of the bottom skin. I
wouldn't lose any sleep about signal loss in the coax cable. I have had
my transponder certified and used it with ATC with no complaints from
anyone.
Paul
Zodiac XL in phase I flight test ~25 hours
On 1/18/2012 4:43 PM, Larry Winger wrote:
> On the 601XL or 650, where have builders placed the transponder
> antenna? I'm considering a location on the bottom of the aircraft,
> just behind the center spar and under the seat area. The advantages
> of that location seem to be a short coax run, minimizing signal loss.
> The disadvantages might be shadow effect on the ground.
>
> I would appreciate your thoughts before I drill holes. Thanks.
>
> Larry Winger
> Tustin, CA
> CH 650B / Corvair
> Wiring
> *
>
>
> *
Message 5
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| Subject: | Re: Transponder antenna location |
On Jan 18, 2012, at 6:43 PM, Larry Winger wrote:
> On the 601XL or 650, where have builders placed the transponder antenna? I'm
considering a location on the bottom of the aircraft, just behind the center
spar and under the seat area. The advantages of that location seem to be a short
coax run, minimizing signal loss. The disadvantages might be shadow effect
on the ground.
>
> I would appreciate your thoughts before I drill holes. Thanks.
That's where mine is, no complaints from ATC. That's where it is on most factory
built planes.
I don't understand your concerns about shadow effects on the ground, the transponder
isn't used on the ground for the most part. It's for signaling your position
in the air.
--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus redrive.
do not archive.
Message 6
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| Subject: | Re: Transponder antenna location |
Thanks, guys. Bryan, you're right about shadow effects. Not an issue.
Back to drilling.
Larry
On Wed, Jan 18, 2012 at 5:32 PM, Bryan Martin <bryanmmartin@comcast.net>wrote:
>
>
> On Jan 18, 2012, at 6:43 PM, Larry Winger wrote:
>
> > On the 601XL or 650, where have builders placed the transponder antenna?
> I'm considering a location on the bottom of the aircraft, just behind the
> center spar and under the seat area. The advantages of that location seem
> to be a short coax run, minimizing signal loss. The disadvantages might be
> shadow effect on the ground.
> >
> > I would appreciate your thoughts before I drill holes. Thanks.
>
> That's where mine is, no complaints from ATC. That's where it is on most
> factory built planes.
>
> I don't understand your concerns about shadow effects on the ground, the
> transponder isn't used on the ground for the most part. It's for signaling
> your position in the air.
>
>
> --
> Bryan Martin
> N61BM, CH 601 XL,
> RAM Subaru, Stratus redrive.
> do not archive.
>
>
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