---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 06/02/19: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:18 AM - Re: Antenna Ground Plane (Robert L. Nuckolls, III) 2. 10:55 AM - Re: Antenna Ground Plane (Charlie England) 3. 11:07 AM - Re: Antenna Ground Plane (Alec Myers) 4. 02:42 PM - Re: Antenna Ground Plane (Robert L. Nuckolls, III) 5. 04:47 PM - Re: Antenna Ground Plane () 6. 07:02 PM - THE FASCINATING WORLD OF SOLDER ALLOYS AND METALLURGY (Art Zemon) ________________________________ Message 1 _____________________________________ Time: 10:18:28 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Antenna Ground Plane At 08:39 PM 5/30/2019, you wrote: >Hello, > >I'm installing an ACK ELT in a composite aircraft and they recommend >an aluminum foil ground plane for the antenna. > >My question is how do you ensure conductivity between the layers of >the adhesive aluminum foil and how do you attach the antenna to the foil? > >They also want the antenna to be more than 3 ft away from the com >antenna, why would this be? Might be easier to ditch the whip antenna and go with the RST design semi-dipoles discussed here on the List about 7 years ago: https://tinyurl.com/yyz6anjs This antenna is a dual frequency DIPOLE that does not require a ground plane. It mounts no the side of your fuselage inside surface. What is the material used in your airplane's construction? Bob . . . ________________________________ Message 2 _____________________________________ Time: 10:55:45 AM PST US Subject: Re: AeroElectric-List: Antenna Ground Plane From: Charlie England On 6/2/2019 12:17 PM, Robert L. Nuckolls, III wrote: > At 08:39 PM 5/30/2019, you wrote: >> Hello, >> >> Im installing an ACK ELT in a composite aircraft and they recommend >> an aluminum foil ground plane for the antenna. >> >> My question is how do you ensure conductivity between the layers of >> the adhesive aluminum foil and how do you attach the antenna to the foil? >> >> They also want the antenna to be more than 3 ft away from the com >> antenna, why would this be? > > Might be easier to ditch the whip antenna > and go with the RST design semi-dipoles > discussed here on the List about 7 years > ago: > > > https://tinyurl.com/yyz6anjs > > This antenna is a dual frequency DIPOLE > that does not require a ground plane. > It mounts no the side of your fuselage > inside surface. > > What is the material used in your > airplane's construction? > > > Bob . . . > Don't know if this is reality, but I've seen some discussion in the past about ELTs' supplied-antennas being part of the certification 'package'. I know we're experimentals, but some things we don't get a pass on, like IFR GPS vs non-TSO nav/ILS radios. ELTs in general don't give me a lot of warm & fuzzies, but I would like to be confident that my insurance company doesn't have an 'out' if they're asked to pay on an accident that I've survived. Just a thought... Charlie --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 3 _____________________________________ Time: 11:07:20 AM PST US From: Alec Myers Subject: Re: AeroElectric-List: Antenna Ground Plane Bob, If you change the antenna, does the ELT still meet TSO-C126b, is it still =9Capproved=9D, and does it still meet 14 CFR =C2=A7 91.207? On Jun 2, 2019, at 13:17, Robert L. Nuckolls, III wrote: At 08:39 PM 5/30/2019, you wrote: > Hello, > > I=99m installing an ACK ELT in a composite aircraft and they recomme nd an aluminum foil ground plane for the antenna. > > My question is how do you ensure conductivity between the layers of the ad hesive aluminum foil and how do you attach the antenna to the foil? > > They also want the antenna to be more than 3 ft away from the com antenna, why would this be? Might be easier to ditch the whip antenna and go with the RST design semi-dipoles discussed here on the List about 7 years ago: https://tinyurl.com/yyz6anjs This antenna is a dual frequency DIPOLE that does not require a ground plane. It mounts no the side of your fuselage inside surface. What is the material used in your airplane's construction? Bob . . . ________________________________ Message 4 _____________________________________ Time: 02:42:57 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Antenna Ground Plane At 12:58 PM 6/2/2019, you wrote: >Bob, > >If you change the antenna, does the ELT still >meet TSO-C126b, is it still =9Capproved=9D, and >does it still meet 14 CFR =C2=A7 91.207? probably not according to the guy that walks around with a rule book under his arm . . . but it does meet the spirit and intent. Jim sold a lot of kits. Bob . . . ________________________________ Message 5 _____________________________________ Time: 04:47:50 PM PST US From: Subject: RE: AeroElectric-List: Antenna Ground Plane Thank you very much for the help. The aircraft is a KIS made from honeycomb and fiberglass On the dipole antenna what length should the folded balun be and do I make the toroid balun with 3 toroids as in the instruction? Just out of interest why should the ELT antenna be separated from the com antenna Thanks again Mike From: owner-aeroelectric-list-server@matronics.com On Behalf Of Robert L. Nuckolls, III Sent: June 2, 2019 10:18 AM Subject: Re: AeroElectric-List: Antenna Ground Plane At 08:39 PM 5/30/2019, you wrote: Hello, I'm installing an ACK ELT in a composite aircraft and they recommend an aluminum foil ground plane for the antenna. My question is how do you ensure conductivity between the layers of the adhesive aluminum foil and how do you attach the antenna to the foil? They also want the antenna to be more than 3 ft away from the com antenna, why would this be? Might be easier to ditch the whip antenna and go with the RST design semi-dipoles discussed here on the List about 7 years ago: https://tinyurl.com/yyz6anjs This antenna is a dual frequency DIPOLE that does not require a ground plane. It mounts no the side of your fuselage inside surface. What is the material used in your airplane's construction? Bob . . . --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 6 _____________________________________ Time: 07:02:36 PM PST US From: Art Zemon Subject: AeroElectric-List: THE FASCINATING WORLD OF SOLDER ALLOYS AND METALLURGY I just ran across this very interesting article THE FASCINATING WORLD OF SOLDER ALLOYS AND METALLURGY Cheers, -- Art Z. -- https://CheerfulCurmudgeon.com/ *Pray as if everything depends on God. 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