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           ----------------------------------------------------------
                           AeroElectric-List Digest Archive
                                      ---
                     Total Messages Posted Sat 07/20/19: 6
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Today's Message Index:
----------------------
 
     1. 02:26 AM - Re: [OT] IFR-certified GPS Suggestions  (donjohnston)
     2. 06:50 AM - IFR-certified GPS Suggestions  (GLEN MATEJCEK)
     3. 09:25 AM - ELT antenna, BALUNS and stuff  (Robert L. Nuckolls, III)
     4. 01:31 PM - Re: IFR-certified GPS Suggestions  (Kelly McMullen)
     5. 06:12 PM - ADS-B - Garmin GDL-82 installation  (Argonaut36)
     6. 07:53 PM - Re: ADS-B - Garmin GDL-82 installation  (Hal Benjamin)
 
 
________________________________  Message 1  _____________________________________


Time: 02:26:33 AM PST US
Subject: AeroElectric-List: Re: [OT] IFR-certified GPS Suggestions
From: "donjohnston" <don@velocity-xl.com>


argoldman(at)aol.com wrote:
> Thanks, Somewhere in the back of my mind is that there is a procedure that you
have to go through to verify that the adsb is operating correctly. Plane not
flying yet-- almost done (15 years).
>    --


I used this to verify my ADS-B install. 

https://adsbperformance.faa.gov/paprrequest.aspx


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=490436#490436


________________________________  Message 2  _____________________________________


Time: 06:50:17 AM PST US
From: GLEN MATEJCEK <fly4grins@gmail.com>
Subject: AeroElectric-List: IFR-certified GPS Suggestions

>
> That's an interesting evolution.  It used to be that the only bit of
> equipment on an experimental that was required to have a TSO was GPS for
> terminal ops.  I've spent a little time searching, and can't find any such
> reference anymore.  The AIM does indeed make a blanket statement with
> regard to having TSO'd GPS, which is curious as the AIM isn't regulatory.
> (Of course, if one finds themselves in front of an administrative law judge
> due to nonconformity with the AIM one will likely be in a world of hurt,
> but that's a different topic...).  So, I wonder if all the folks with
> non-TSO'd GPS are grandfathered somehow, or just SOL...
>
>

________________________________  Message 3  _____________________________________


Time: 09:25:14 AM PST US
From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
Subject: AeroElectric-List: ELT antenna, BALUNS and stuff


Got the VNA back up and running. Did some
quick scans of a couple of BALUN configurations
and got some amazing (or should I say consternating)
results. At first blush it seems that conventional
wisdom may have failed us.

Need to repeat the experiments with more rigorous
attention to process and calibration . . .
watch this space.

Got the elements fabricated for a Jim Wier
ELT antenna. I'll be assembling those on
a test fixture with opportunity to explore
BALUN configurations . . .


   Bob . . . 


________________________________  Message 4  _____________________________________


Time: 01:31:39 PM PST US
Subject: Re: AeroElectric-List: IFR-certified GPS Suggestions
From: Kelly McMullen <kellym@aviating.com>


There is an advisory circular on GPS install. I forget the first two 
digits, after the dash its 138a, which for most purposes can be 
considered regulatory.  While you could get away with most anything if 
you declare an emergency, I wouldn't make a habit of that.
I don't believe the FAA has ever "approved" of using anything but a TSO
GPS. I believe you also have to have a TSO approved ELT unless you meet 
the exceptions like single seat.

On 7/20/2019 6:48 AM, GLEN MATEJCEK wrote:
>     That's an interesting evolution. It used to be that the only bit of
>     equipment on an experimental that was required to have a TSO was GPS
>     for terminal ops. I've spent a little time searching, and can't
>     find any such reference anymore. The AIM does indeed make a blanket
>     statement with regard to having TSO'd GPS, which is curious as the
>     AIM isn't regulatory. (Of course, if one finds themselves in front
>     of an administrative law judge due to nonconformity with the AIM one
>     will likely be in a world of hurt, but that's a different
>     topic...). So, I wonder if all the folks with non-TSO'd GPS are
>     grandfathered somehow, or just SOL...
> 


________________________________  Message 5  _____________________________________


Time: 06:12:08 PM PST US
Subject: AeroElectric-List: ADS-B - Garmin GDL-82 installation
From: "Argonaut36" <fmlibrino@msn.com>


In my airplane there are at least 3 options for grounding the GDL-82:
1.	Grounding to the avionics box that contains the electrical bus, the radio and
the transponder.  The box is attached with screws to lugs welded to the airplane
tubular frame.  Paint was removed where necessary to ensure good electrical
continuity to the frame.
2.	Grounding to a single screw on the firewall to which the radio, the transponder
and the encoder are already grounded.
3.	Grounding to a new screw on the firewall in the general area where the above
mentioned ground screw is.
What would be the recommended solution?  Right now (before installing the GDL-82)
there is some background noise in the radio, transmitting and receiving.  I
am concerned about the GDL-82 working properly and not making the radio worse.
Thanks


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=490457#490457


________________________________  Message 6  _____________________________________


Time: 07:53:47 PM PST US
From: Hal Benjamin <halbenjamin101@gmail.com>
Subject: Re: AeroElectric-List: ADS-B - Garmin GDL-82 installation


I grounded mine to the common forest of tabs on the firewall. All tested well on
ground and in the NYC airspace. Good luck.

Hal Benjamin 
RV4

Sent from my iPad

> On Jul 20, 2019, at 9:10 PM, Argonaut36 <fmlibrino@msn.com> wrote:
> 
> 
> In my airplane there are at least 3 options for grounding the GDL-82:
> 1.    Grounding to the avionics box that contains the electrical bus, the radio
and the transponder.  The box is attached with screws to lugs welded to the
airplane tubular frame.  Paint was removed where necessary to ensure good electrical
continuity to the frame.
> 2.    Grounding to a single screw on the firewall to which the radio, the transponder
and the encoder are already grounded.
> 3.    Grounding to a new screw on the firewall in the general area where the
above mentioned ground screw is.
> What would be the recommended solution?  Right now (before installing the GDL-82)
there is some background noise in the radio, transmitting and receiving.
I am concerned about the GDL-82 working properly and not making the radio worse.
> Thanks
> 
> 
> 
> 
> Read this topic online here:
> 
> http://forums.matronics.com/viewtopic.php?p=490457#490457
> 
> 
> 
> 
> 
> 
> 
> 
> 


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