---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 04/04/23: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:40 AM - Re: Radio noise (Paul McAllister) 2. 07:52 AM - Re: Radio noise (William Daniell) 3. 08:15 AM - Re: Radio noise (Charlie England) 4. 08:37 AM - Re: Radio noise (S Remerez) 5. 09:49 AM - Re: Radio noise (Paul McAllister) 6. 09:52 AM - Re: Radio noise (Paul McAllister) 7. 10:48 AM - Re: Radio noise (Charlie England) 8. 06:50 PM - Re: Radio noise (William Daniell) ________________________________ Message 1 _____________________________________ Time: 07:40:25 AM PST US From: Paul McAllister Subject: Re: AeroElectric-List: Radio noise Hi Bob, no not really but a couple of things came up recently that piqued my curiosity. I rented a RV12 from the local flight school and the background noise on the radio was loud. It was fitted out with a Dynon and a Garmin SL40. I =99m not particularly interested to dig into it but I was look for a =9Cti ps=99s and tricks=9D document that I could pass onto the owner. The noise sounded like =9Celectronic hash=9D and could probably be filtered out on the feed to the radio but that approach doesn=99t address the root cause. The other noisy radio gremlin is on a friend=99s C150. I haven =99t dug into it yet but it sounds awfully like a failed diode in the alternator. I will dig out my oscilloscope and take a look once the weather has warmed up. Cheers, Paul On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > At 09:11 PM 4/2/2023, you wrote: > > Interesting question for which I don't > have an answer of the top . . . > > I've never encountered a document that > prescribes recipes for investigation. > Doesn't mean one does not exist but > it's not how I acquired the skills. > > I took courses and applied information > on how to design and then qualify devices > demonstrating harmonious integration > products into the aviation electronic > environment. After a few decades of > hammering out those solutions, you > sorta develop a sense of which guiding > principal is NOT in operation when > tracking down root cause of a problem. > > Are you wrestling with a problem now? > > > Bob . . . > > //// > (o o) > ===========o00o=(_)=o00o====== == > < Go ahead, make my day . . . > > < show me where I'm wrong. > > ======================= ========= > > In the interest of creative evolution > of the-best-we-know-how-to-do based > on physics and good practice. > ________________________________ Message 2 _____________________________________ Time: 07:52:21 AM PST US From: William Daniell Subject: Re: AeroElectric-List: Radio noise Paul If its a dynon you can try entering settings/radio and turning mic gain to 25%. You enter setting by long press two right hand buttons simultaneously. Will William Daniell +1 786 878 0246 On Tue, Apr 4, 2023, 10:48 Paul McAllister wrote: > Hi Bob, no not really but a couple of things came up recently that piqued > my curiosity. > > > I rented a RV12 from the local flight school and the background noise on > the radio was loud. It was fitted out with a Dynon and a Garmin SL40. I =99m > not particularly interested to dig into it but I was look for a =9C tips=99s and > tricks=9D document that I could pass onto the owner. > > > The noise sounded like =9Celectronic hash=9D and could probab ly be filtered > out on the feed to the radio but that approach doesn=99t address th e root > cause. > > > The other noisy radio gremlin is on a friend=99s C150. I haven =99t dug into > it yet but it sounds awfully like a failed diode in the alternator. I wil l > dig out my oscilloscope and take a look once the weather has warmed up. > > > Cheers, Paul > > On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III < > nuckolls.bob@aeroelectric.com> wrote: > >> At 09:11 PM 4/2/2023, you wrote: >> > > >> Interesting question for which I don't >> have an answer of the top . . . >> >> I've never encountered a document that >> prescribes recipes for investigation. >> Doesn't mean one does not exist but >> it's not how I acquired the skills. >> >> I took courses and applied information >> on how to design and then qualify devices >> demonstrating harmonious integration >> products into the aviation electronic >> environment. After a few decades of >> hammering out those solutions, you >> sorta develop a sense of which guiding >> principal is NOT in operation when >> tracking down root cause of a problem. >> >> Are you wrestling with a problem now? >> >> >> >> Bob . . . >> >> //// >> (o o) >> ===========o00o=(_)=o00o====== == >> < Go ahead, make my day . . . > >> < show me where I'm wrong. > >> ======================= ========= >> >> In the interest of creative evolution >> of the-best-we-know-how-to-do based >> on physics and good practice. >> > ________________________________ Message 3 _____________________________________ Time: 08:15:51 AM PST US From: Charlie England Subject: Re: AeroElectric-List: Radio noise I have a very fuzzy memory of some early Dynon screens emitting RF hash. Might be worth perusing the Dynon forum archives to see if something pops up. On Tue, Apr 4, 2023 at 9:55=AFAM William Daniell wrote: > Paul > If its a dynon you can try entering settings/radio and turning mic gain t o > 25%. > > You enter setting by long press two right hand buttons simultaneously. > > Will > > William Daniell > +1 786 878 0246 > > On Tue, Apr 4, 2023, 10:48 Paul McAllister > wrote: > >> Hi Bob, no not really but a couple of things came up recently that pique d >> my curiosity. >> >> >> I rented a RV12 from the local flight school and the background noise on >> the radio was loud. It was fitted out with a Dynon and a Garmin SL40. I=99m >> not particularly interested to dig into it but I was look for a =9Ctips=99s and >> tricks=9D document that I could pass onto the owner. >> >> >> The noise sounded like =9Celectronic hash=9D and could proba bly be filtered >> out on the feed to the radio but that approach doesn=99t address t he root >> cause. >> >> >> The other noisy radio gremlin is on a friend=99s C150. I haven =99t dug into >> it yet but it sounds awfully like a failed diode in the alternator. I wi ll >> dig out my oscilloscope and take a look once the weather has warmed up. >> >> >> Cheers, Paul >> >> On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III < >> nuckolls.bob@aeroelectric.com> wrote: >> >>> At 09:11 PM 4/2/2023, you wrote: >>> >> >> >>> Interesting question for which I don't >>> have an answer of the top . . . >>> >>> I've never encountered a document that >>> prescribes recipes for investigation. >>> Doesn't mean one does not exist but >>> it's not how I acquired the skills. >>> >>> I took courses and applied information >>> on how to design and then qualify devices >>> demonstrating harmonious integration >>> products into the aviation electronic >>> environment. After a few decades of >>> hammering out those solutions, you >>> sorta develop a sense of which guiding >>> principal is NOT in operation when >>> tracking down root cause of a problem. >>> >>> Are you wrestling with a problem now? >>> >>> >>> >>> Bob . . . >>> >>> //// >>> (o o) >>> ===========o00o=(_)=o00o====== == >>> < Go ahead, make my day . . . > >>> < show me where I'm wrong. > >>> ====================== >>> >>> In the interest of creative evolution >>> of the-best-we-know-how-to-do based >>> on physics and good practice. >>> >> ________________________________ Message 4 _____________________________________ Time: 08:37:20 AM PST US From: S Remerez Subject: Re: AeroElectric-List: Radio noise Paul, I have some ideas about how to fix noise problems.=C2- The trick is two-f old.=C2- One is to eliminate the source noise.=C2- Two is to make the d estination more immune to noise.=C2- If you want my advice, send me an em ail.=C2- It's free and worth every penny. Simon On Apr 4, 2023 at 10:39 AM, Paul McAllister wr ote: Hi Bob, no not really but a couple of things came up recently that piqued m y curiosity. I rented a RV12 from the local flight school and the background noise on th e radio was loud.=C2-=C2-It was fitted out with a Dynon and a Garmin SL 40.=C2-=C2-I=99m not particularly interested to dig into it but I was look for a =9Ctips=99s and tricks=9D document that I could pass onto the owner. The noise sounded like =9Celectronic hash=9D and could probably be filtered out on the feed to the radio but that approach doesn=99t address the root cause. The other noisy radio gremlin is on a friend=99s C150.=C2-=C2-I h aven=99t dug into it yet but it sounds awfully like a failed diode in the alternator. I will dig out my oscilloscope and take a look once the we ather has warmed up. Cheers, Paul On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III wrote: At 09:11 PM 4/2/2023, you wrote: =C2-=C2-=C2- Interesting question for which I don't =C2-=C2-=C2- have an answer of the top . . . =C2-=C2-=C2- I've never encountered a document that =C2-=C2-=C2- prescribes recipes for investigation. =C2-=C2-=C2- Doesn't mean one does not exist but =C2-=C2-=C2- it's not how I acquired the skills. =C2-=C2-=C2- I took courses and applied information =C2-=C2-=C2- on how to design and then qualify devices =C2-=C2-=C2- demonstrating harmonious integration =C2-=C2-=C2- products into the aviation electronic =C2-=C2-=C2- environment. After a few decades of =C2-=C2-=C2- hammering out those solutions, you =C2-=C2-=C2- sorta develop a sense of which guiding =C2-=C2-=C2- principal is NOT in operation when =C2-=C2-=C2- tracking down root cause of a problem. =C2-=C2-=C2- Are you wrestling with a problem now? =C2-=C2-=C2- =C2- Bob . . . =C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2 -=C2-=C2-=C2-=C2-=C2-//// =C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2-=C2 -=C2-=C2-=C2-=C2-(o o) =C2-=C2- ===========o00o=(_)=o00o==== ===== =C2-=C2- < Go ahead, make my day . . .=C2-=C2- > =C2-=C2- < show me where I'm wrong.=C2-=C2-=C2-=C2-=C2-> =C2-=C2- ==================== ============ =C2- =C2-=C2- In the interest of creative evolution =C2-=C2- of the-best-we-know-how-to-do based =C2-=C2- on physics and good practice. ________________________________ Message 5 _____________________________________ Time: 09:49:44 AM PST US From: Paul McAllister Subject: Re: AeroElectric-List: Radio noise Will, The EFIS is a Dynon but the radio is a Garmin SL40. If not familiar with Dynon, is there a possibility that the mic input would be routed through the EFIS to the SL40? Thanks, Paul On Tue, Apr 4, 2023 at 9:55 AM William Daniell wrote: > Paul > If its a dynon you can try entering settings/radio and turning mic gain t o > 25%. > > You enter setting by long press two right hand buttons simultaneously. > > Will > > William Daniell > +1 786 878 0246 > > On Tue, Apr 4, 2023, 10:48 Paul McAllister > wrote: > >> Hi Bob, no not really but a couple of things came up recently that pique d >> my curiosity. >> >> >> I rented a RV12 from the local flight school and the background noise on >> the radio was loud. It was fitted out with a Dynon and a Garmin SL40. I=99m >> not particularly interested to dig into it but I was look for a =9Ctips=99s and >> tricks=9D document that I could pass onto the owner. >> >> >> The noise sounded like =9Celectronic hash=9D and could proba bly be filtered >> out on the feed to the radio but that approach doesn=99t address t he root >> cause. >> >> >> The other noisy radio gremlin is on a friend=99s C150. I haven =99t dug into >> it yet but it sounds awfully like a failed diode in the alternator. I wi ll >> dig out my oscilloscope and take a look once the weather has warmed up. >> >> >> Cheers, Paul >> >> On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III < >> nuckolls.bob@aeroelectric.com> wrote: >> >>> At 09:11 PM 4/2/2023, you wrote: >>> >> >> >>> Interesting question for which I don't >>> have an answer of the top . . . >>> >>> I've never encountered a document that >>> prescribes recipes for investigation. >>> Doesn't mean one does not exist but >>> it's not how I acquired the skills. >>> >>> I took courses and applied information >>> on how to design and then qualify devices >>> demonstrating harmonious integration >>> products into the aviation electronic >>> environment. After a few decades of >>> hammering out those solutions, you >>> sorta develop a sense of which guiding >>> principal is NOT in operation when >>> tracking down root cause of a problem. >>> >>> Are you wrestling with a problem now? >>> >>> >>> >>> Bob . . . >>> >>> //// >>> (o o) >>> ===========o00o=(_)=o00o====== == >>> < Go ahead, make my day . . . > >>> < show me where I'm wrong. > >>> ====================== >>> >>> In the interest of creative evolution >>> of the-best-we-know-how-to-do based >>> on physics and good practice. >>> >> ________________________________ Message 6 _____________________________________ Time: 09:52:43 AM PST US From: Paul McAllister Subject: Re: AeroElectric-List: Radio noise Great idea, I=99ll post a question on the Dynon forum. On Tue, Apr 4, 2023 at 10:19 AM Charlie England wrote: > I have a very fuzzy memory of some early Dynon screens emitting RF hash. > Might be worth perusing the Dynon forum archives to see if something pops > up. > > ________________________________ Message 7 _____________________________________ Time: 10:48:26 AM PST US Subject: Re: AeroElectric-List: Radio noise From: Charlie England I'm not Will, but that would be extremely unlikely (unless we're talking about Dynon's intercom). https://dynonavionics.com/two-place-stereo-intercom.php On 4/4/2023 11:48 AM, Paul McAllister wrote: > Will, > > The EFIS is a Dynon but the radio is a Garmin SL40. If not familiar > with Dynon, is there a possibility that the mic input would be routed > through the EFIS to the SL40? > > Thanks, Paul > > On Tue, Apr 4, 2023 at 9:55 AM William Daniell > wrote: > > Paul > If its a dynon you can try entering settings/radio and turning mic > gain to 25%. > > You enter setting by long press two right hand buttons simultaneously. > > Will > > William Daniell > +1 786 878 0246 > > On Tue, Apr 4, 2023, 10:48 Paul McAllister > wrote: > > Hi Bob, no not really but a couple of things came up recently > that piqued my curiosity. > > > I rented a RV12 from the local flight school and the > background noise on the radio was loud. It was fitted out with > a Dynon and a Garmin SL40. Im not particularly interested to > dig into it but I was look for a tipss and tricks document > that I could pass onto the owner. > > > The noise sounded like electronic hash and could probably be > filtered out on the feed to the radio but that approach > doesnt address the root cause. > > > The other noisy radio gremlin is on a friends C150. I havent > dug into it yet but it sounds awfully like a failed diode in > the alternator. I will dig out my oscilloscope and take a look > once the weather has warmed up. > > > Cheers, Paul > > > On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III > wrote: > > At 09:11 PM 4/2/2023, you wrote: > > > Interesting question for which I don't > have an answer of the top . . . > > I've never encountered a document that > prescribes recipes for investigation. > Doesn't mean one does not exist but > it's not how I acquired the skills. > > I took courses and applied information > on how to design and then qualify devices > demonstrating harmonious integration > products into the aviation electronic > environment. After a few decades of > hammering out those solutions, you > sorta develop a sense of which guiding > principal is NOT in operation when > tracking down root cause of a problem. > > Are you wrestling with a problem now? > > > Bob . . . > > //// > (o o) > ===========o00o=(_)=o00o======== > < Go ahead, make my day . . . > > < show me where I'm wrong. > > ================================ > > In the interest of creative evolution > of the-best-we-know-how-to-do based > on physics and good practice. > -- This email has been checked for viruses by Avast antivirus software. www.avast.com ________________________________ Message 8 _____________________________________ Time: 06:50:50 PM PST US From: William Daniell Subject: Re: AeroElectric-List: Radio noise Ah...with the dynon system you can control the radio settings through the main screen. Dunno if this would work with a garmin radio. William Daniell +1 786 878 0246 On Tue, Apr 4, 2023, 13:50 Charlie England wrote: > I'm not Will, but that would be extremely unlikely (unless we're talking > about Dynon's intercom). > https://dynonavionics.com/two-place-stereo-intercom.php > > > On 4/4/2023 11:48 AM, Paul McAllister wrote: > > Will, > > The EFIS is a Dynon but the radio is a Garmin SL40. If not familiar with > Dynon, is there a possibility that the mic input would be routed through > the EFIS to the SL40? > > Thanks, Paul > > On Tue, Apr 4, 2023 at 9:55 AM William Daniell < > wdaniell.longport@gmail.com> wrote: > >> Paul >> If its a dynon you can try entering settings/radio and turning mic gain >> to 25%. >> >> You enter setting by long press two right hand buttons simultaneously. >> >> Will >> >> William Daniell >> +1 786 878 0246 >> >> On Tue, Apr 4, 2023, 10:48 Paul McAllister >> wrote: >> >>> Hi Bob, no not really but a couple of things came up recently that >>> piqued my curiosity. >>> >>> >>> I rented a RV12 from the local flight school and the background noise o n >>> the radio was loud. It was fitted out with a Dynon and a Garmin SL40. I=99m >>> not particularly interested to dig into it but I was look for a =9Ctips=99s and >>> tricks=9D document that I could pass onto the owner. >>> >>> >>> The noise sounded like =9Celectronic hash=9D and could prob ably be filtered >>> out on the feed to the radio but that approach doesn=99t address the root >>> cause. >>> >>> >>> The other noisy radio gremlin is on a friend=99s C150. I haven =99t dug >>> into it yet but it sounds awfully like a failed diode in the alternator . I >>> will dig out my oscilloscope and take a look once the weather has warme d up. >>> >>> >>> Cheers, Paul >>> >>> On Mon, Apr 3, 2023 at 5:45 PM Robert L. Nuckolls, III < >>> nuckolls.bob@aeroelectric.com> wrote: >>> >>>> At 09:11 PM 4/2/2023, you wrote: >>>> >>> >>> >>>> Interesting question for which I don't >>>> have an answer of the top . . . >>>> >>>> I've never encountered a document that >>>> prescribes recipes for investigation. >>>> Doesn't mean one does not exist but >>>> it's not how I acquired the skills. >>>> >>>> I took courses and applied information >>>> on how to design and then qualify devices >>>> demonstrating harmonious integration >>>> products into the aviation electronic >>>> environment. After a few decades of >>>> hammering out those solutions, you >>>> sorta develop a sense of which guiding >>>> principal is NOT in operation when >>>> tracking down root cause of a problem. >>>> >>>> Are you wrestling with a problem now? >>>> >>>> >>>> >>>> Bob . . . >>>> >>>> //// >>>> (o o) >>>> ===========o00o=(_)=o00o===== === >>>> < Go ahead, make my day . . . > >>>> < show me where I'm wrong. > >>>> ====================== >>>> >>>> In the interest of creative evolution >>>> of the-best-we-know-how-to-do based >>>> on physics and good practice. >>>> >>> > > > > Virus-free.www.avast.com > > <#m_6527359612219019859_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.