---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 07/23/19: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:54 AM - IFR-certified GPS Suggestions (GLEN MATEJCEK) 2. 09:20 AM - AT-6C ballast resistor? (Nigel Willson) 3. 09:14 PM - Battery maintainers (Ron Burnett) ________________________________ Message 1 _____________________________________ Time: 05:54:29 AM PST US From: GLEN MATEJCEK Subject: AeroElectric-List: IFR-certified GPS Suggestions Hi Kelley- sorry for the delay, but the trip to OSH and related wx issues have had me offline for a bit. *SNIP* 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. Believe it or not, such is the case. Right off the top of my head Blue Mountain comes to mind, among others. All non-certified and all used IFR. WRT the ELT, the salient quote in the reg is "meets the requirements of TSO -C91". It doesn't say has a TSO sticker on it. This is a fine legal point, similar to the part about experimentals having to address AD's, not comply with them. Now, I certainly wouldn't recommend scratch building a radio and expecting a fed to take your word for it's suitability, but the legal principle still stands. All of this was brought to my attention at the time by the local mx fed that handled homebuilts. Unfortunately, there is as much confusion on these matters within the ranks of the feds as there is at the average fly in breakfast, but a quick call to EAA government relations will likely get you a pretty quick and concise answer. Especially when it comes to recent developments, as the FAA has liaised with EAA on regulatory issues affecting homebuilts. ics.com> wrote: > * > > ================================================= > Online Versions of Today's List Digest Archive > ================================================= > > Today's complete AeroElectric-List Digest can also be found in either of > the > two Web Links listed below. The .html file includes the Digest formatted > in HTML for viewing with a web browser and features Hyperlinked Indexes > and Message Navigation. The .txt file includes the plain ASCII version > of the AeroElectric-List Digest and can be viewed with a generic text > editor > such as Notepad or with a web browser. > > HTML Version: > > > http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 19-07-20&Archive=AeroElectric > > Text Version: > > > http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 19-07-20&Archive=AeroElectric > > > =============================================== > EMail Version of Today's List Digest Archive > =============================================== > > > ---------------------------------------------------------- > AeroElectric-List Digest Archive > --- > Total Messages Posted Sat 07/20/19: 6 > ---------------------------------------------------------- > > > 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" > > > 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 > 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" > 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 > > > 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" > > > 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 > 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 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 > > > > > > > > > > > > > > > > > > > > ________________________________ Message 2 _____________________________________ Time: 09:20:39 AM PST US From: Nigel Willson Subject: AeroElectric-List: AT-6C ballast resistor? 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Anyone have this unit or a knowledgeable suggestion? Thanks, Ron Burnett RV-6A May you have the Lord's blessings today! 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