Re: Comm Antenna Location

[windshieldguy2000]

'To All:

I'm installing a Garmin 300 GPS / Comm in my airplane and was
wondering if anyone had experience with this installation in an F-24R
and if so, where they put the comm antenna and what kind of luck they
had with their installation. The avionics shop says "DO NOT put the
antenna between the gear legs". Okay, that leaves a lot of other
places for it. One guy says put it on the belly quite a ways aft on
the fuselage, another says put it directly over the cockpit in the
top center of the fuselage, another says use the wing root fairing as
a mounting point (grounding plane), and still another says I should
hide the antenna inside the fuselage. None of these folks has ever
installed a Garmin 300 on a Fairchild, so this is why I'm posing the
question to the group. I'm also needing the radio to work fairly
well since the airplane is going to be kept at a towered airport in
the Dallas-Fort Worth area, home of some really busy airspace.

Thanks in advance for the help.

Brad Donner
NC77605'

[danMichael]

'Brad:

> I'm installing a Garmin 300 GPS / Comm in my airplane and was
> wondering if anyone had experience with this installation in an F-24R
> and if so, where they put the comm antenna and what kind of luck they
> had with their installation. The avionics shop says "DO NOT put the
> antenna between the gear legs". Okay, that leaves a lot of other
> places for it. One guy says put it on the belly quite a ways aft on
> the fuselage, another says put it directly over the cockpit in the
> top center of the fuselage, another says use the wing root fairing as
> a mounting point (grounding plane), and still another says I should
> hide the antenna inside the fuselage. None of these folks has ever
> installed a Garmin 300 on a Fairchild, so this is why I'm posing the
> question to the group. I'm also needing the radio to work fairly
> well since the airplane is going to be kept at a towered airport in
> the Dallas-Fort Worth area, home of some really busy airspace.

I had a Garmin SL60 installed in my F24 a few years back. The radio
shop thought that the wing root fairing would not offer a sufficient
ground plane so the comm antenna was mounted on the boot cowl between
the landing gear legs. I can verify that this is not good for
reception when the station is in line with the gear — I once couldnt
contact the tower from the ramp until I swung the plane 90 degrees!

:Dan
:NC81323'

[Bob Haas]

'I installed my GPS antenna on the top of the dash panel inside next to the
windscreen between the V shaped braces, worked just fine. Ran the coax along
the in side of the windscreen, around the edge to under the dash.

-----Original Message-----
From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
On Behalf Of danMichael
Sent: Friday, April 07, 2006 12:56 AM
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] Comm Antenna Location

Brad:

> I'm installing a Garmin 300 GPS / Comm in my airplane and was
> wondering if anyone had experience with this installation in an F-24R
> and if so, where they put the comm antenna and what kind of luck they
> had with their installation. The avionics shop says "DO NOT put the
> antenna between the gear legs". Okay, that leaves a lot of other
> places for it. One guy says put it on the belly quite a ways aft on
> the fuselage, another says put it directly over the cockpit in the
> top center of the fuselage, another says use the wing root fairing as
> a mounting point (grounding plane), and still another says I should
> hide the antenna inside the fuselage. None of these folks has ever
> installed a Garmin 300 on a Fairchild, so this is why I'm posing the
> question to the group. I'm also needing the radio to work fairly
> well since the airplane is going to be kept at a towered airport in
> the Dallas-Fort Worth area, home of some really busy airspace.

I had a Garmin SL60 installed in my F24 a few years back. The radio
shop thought that the wing root fairing would not offer a sufficient
ground plane so the comm antenna was mounted on the boot cowl between
the landing gear legs. I can verify that this is not good for
reception when the station is in line with the gear - I once couldnt
contact the tower from the ramp until I swung the plane 90 degrees!

:Dan
:NC81323


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