---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 02/05/18: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:24 AM - Continuous Squelch Noise With SV-1000 Display On (William Hunter) 2. 08:41 AM - Re: Continuous Squelch Noise With SV-1000 Display On (Charlie England) 3. 08:51 AM - Re: Continuous Squelch Noise With SV-1000 Display On (Eric Page) 4. 12:53 PM - Re: Continuous Squelch Noise With SV-1000 Display On (Kelly McMullen) 5. 01:15 PM - Re: Continuous Squelch Noise With SV-1000 Display On (William Hunter) 6. 01:40 PM - Re: Continuous Squelch Noise With SV-1000 Display On (Gerald Farek) 7. 06:08 PM - Re: Z-13/8 inquiry (bcone1381) ________________________________ Message 1 _____________________________________ Time: 08:24:07 AM PST US From: "William Hunter" Subject: AeroElectric-List: Continuous Squelch Noise With SV-1000 Display On I am getting a continuous squelch type noise when I have one of the Dynon screens receiving ships power. The Avionics system is two Skyview SV1000 displays, a Dynon radio, a Garmin GTN - 650, and an SL-15 audio panel. The squelch noise is continuous regardless if the engine is running or not so I have eliminated any noise from the alternator system. And I have also disconnected any battery chargers so that the system is running only on airplane battery. I also turned off all shop lights When I first fired up the system it sounded like the squelch was activated on a radio meaning the continuous White Noise sound was in the headsets and/ or the overhead speaker however when somebody would talk on the radio the white noise would go away and the transmission would come out completely clear. The nose is loud and is exactly the same sound the radios make when the squelch switch is in the squelch position.so I thought it was the squelch button/switch. I turned off the Dynon radio and I also turned off the Garmin and the sound continued so those sources of either noise and or squelch were eliminated. I began pulling all of the circuit breakers out one at a time and the sound continued until I pulled out the circuit breaker that powers the left side Dynon screen. The squelch noise stopped even though the backup battery was powering the display. Push the circuit breaker in and the noise started again...pull out the CB and the noise stops and the screen stays on using its backup battery power. So I have confirmed that the only source of noise in the headsets is when the circuit breaker for the left screen is pushed in. Someone on the Dynon forum suggested that it could be a ground loop. The airplane is a composite and all of the ground wires from the instrument panel go to one copper bus bar near the instrument panel and then from the ground bus I have a 12 AWG wire going to the battery negative cable. Does anybody have any recommendations for troubleshooting in addition to what I have done thus far? AS ALWAYS.Thanks for any feedback, experience, and or suggestions! .. Cheers!!! Bill Hunter ________________________________ Message 2 _____________________________________ Time: 08:41:49 AM PST US Subject: Re: AeroElectric-List: Continuous Squelch Noise With SV-1000 Display On From: Charlie England On 2/5/2018 10:22 AM, William Hunter wrote: > > I am getting a continuous squelch type noise when I have one of the > Dynon screens receiving ships power. > > The Avionics system is two Skyview SV1000 displays, a Dynon radio, a > Garmin GTN - 650, and an SL-15 audio panel. > > The squelch noise is continuous regardless if the engine is running or > not so I have eliminated any noise from the alternator system. And I > have also disconnected any battery chargers so that the system is > running only on airplane battery. I also turned off all shop lights > > When I first fired up the system it sounded like the squelch was > activated on a radio meaning the continuous White Noise sound was in > the headsets and/ or the overhead speaker however when somebody would > talk on the radio the white noise would go away and the transmission > would come out completely clear. The nose is loud and is exactly the > same sound the radios make when the squelch switch is in the squelch > positionso I thought it was the squelch button/switch. > > I turned off the Dynon radio and I also turned off the Garmin and the > sound continued so those sources of either noise and or squelch were > eliminated. > > I began pulling all of the circuit breakers out one at a time and the > sound continued until I pulled out the circuit breaker that powers the > left side Dynon screen. The squelch noise stopped even though the > backup battery was powering the display. > > Push the circuit breaker in and the noise started again...pull out the > CB and the noise stops and the screen stays on using its backup > battery power. > > So I have confirmed that the only source of noise in the headsets is > when the circuit breaker for the left screen is pushed in. > > Someone on the Dynon forum suggested that it could be a ground loop. > The airplane is a composite and all of the ground wires from the > instrument panel go to one copper bus bar near the instrument panel > and then from the ground bus I have a 12 AWG wire going to the battery > negative cable. > > Does anybody have any recommendations for troubleshooting in addition > to what I have done thus far? > > AS ALWAYSThanks for any feedback, experience, and or suggestions! > > .. > > Cheers!!! > > Bill Hunter > You said 'left side Dynon'. Do you have a pair? If so, can you swap units left/right & repeat the test? If the noise follows the box, then there's likely a defect in the box itself (probably has a 'switcher' power supply inside that's generating the white noise). If the internal backup battery is something lower than 12V, like a 4.5V or 6V battery, that would raise the odds that it's an internal switching type power supply generating the noise. If the noise doesn't follow the box, then I'd start looking at wiring. Charlie --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 3 _____________________________________ Time: 08:51:48 AM PST US From: Eric Page Subject: Re: AeroElectric-List: Continuous Squelch Noise With SV-1000 Display On One thing you might try, if the Dynon boxes are tray mounted, is to swap the boxes. If the problem follows the box, then it=99s internal to the l eft box. If not, it=99s external. Eric > On Feb 5, 2018, at 8:22 AM, William Hunter wr ote: > > I am getting a continuous squelch type noise when I have one of the Dynon s creens receiving ships power. ________________________________ Message 4 _____________________________________ Time: 12:53:29 PM PST US Subject: Re: AeroElectric-List: Continuous Squelch Noise With SV-1000 Display On From: Kelly McMullen I strongly suggest calling Dynon directly. Their tech support is first rate. Tech support best deals with specific problems over the phone, while their forum is better for general problems. The back up battery is 12 V, 12.25 when fully charged. I have same system, except SL30 and GTN 650, no Dynon radio, and PS Eng intercom/audio panel. On 2/5/2018 9:45 AM, Charlie England wrote: > On 2/5/2018 10:22 AM, William Hunter wrote: >> >> I am getting a continuous squelch type noise when I have one of the >> Dynon screens receiving ships power. >> >> The Avionics system is two Skyview SV1000 displays, a Dynon radio, a >> Garmin GTN - 650, and an SL-15 audio panel. >> >> The squelch noise is continuous regardless if the engine is running or >> not so I have eliminated any noise from the alternator system. And I >> have also disconnected any battery chargers so that the system is >> running only on airplane battery. I also turned off all shop lights > You said 'left side Dynon'. Do you have a pair? If so, can you swap > units left/right & repeat the test? If the noise follows the box, then > there's likely a defect in the box itself (probably has a 'switcher' > power supply inside that's generating the white noise). If the internal > backup battery is something lower than 12V, like a 4.5V or 6V battery, > that would raise the odds that it's an internal switching type power > supply generating the noise. > > If the noise doesn't follow the box, then I'd start looking at wiring. > > Charlie > > > Virus-free. www.avast.com > > > > <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> ________________________________ Message 5 _____________________________________ Time: 01:15:39 PM PST US From: William Hunter Subject: Re: AeroElectric-List: Continuous Squelch Noise With SV-1000 Display On yup... I called a Dynon tech support. He was stumped as well for a while and then after we did some troubleshooting he remembered a possible fix and then he was able to walk me through an internal squelch setting that is in one of the setup pages. I think it has solved the problem but I will wait on that definitive answer until I go and fly again but I think we got it! Thanks, Bill Hunter On Feb 5, 2018 12:58 PM, "Kelly McMullen" wrote: > kellym@aviating.com> > > I strongly suggest calling Dynon directly. Their tech support is first > rate. Tech support best deals with specific problems over the phone, while > their forum is better for general problems. > The back up battery is 12 V, 12.25 when fully charged. > I have same system, except SL30 and GTN 650, no Dynon radio, and PS Eng > intercom/audio panel. > > On 2/5/2018 9:45 AM, Charlie England wrote: > >> On 2/5/2018 10:22 AM, William Hunter wrote: >> >>> >>> I am getting a continuous squelch type noise when I have one of the >>> Dynon screens receiving ships power. >>> >>> The Avionics system is two Skyview SV1000 displays, a Dynon radio, a >>> Garmin GTN - 650, and an SL-15 audio panel. >>> >>> The squelch noise is continuous regardless if the engine is running or >>> not so I have eliminated any noise from the alternator system. And I have >>> also disconnected any battery chargers so that the system is running only >>> on airplane battery. I also turned off all shop lights >>> >> > You said 'left side Dynon'. Do you have a pair? If so, can you swap units >> left/right & repeat the test? If the noise follows the box, then there's >> likely a defect in the box itself (probably has a 'switcher' power supply >> inside that's generating the white noise). If the internal backup battery >> is something lower than 12V, like a 4.5V or 6V battery, that would raise >> the odds that it's an internal switching type power supply generating the >> noise. >> >> If the noise doesn't follow the box, then I'd start looking at wiring. >> >> Charlie >> >> > =link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon> >> Virus-free. www.avast.com > il?utm_medium=email&utm_source=link&utm_campaign=sig-email& >> utm_content=emailclient&utm_term=link> >> >> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >> > > ________________________________ Message 6 _____________________________________ Time: 01:40:42 PM PST US From: Gerald Farek Subject: Re: AeroElectric-List: Continuous Squelch Noise With SV-1000 Display On What was the detailed answer? Sent from my iPhone > On Feb 5, 2018, at 3:14 PM, William Hunter wr ote: > > yup... I called a Dynon tech support. > > > He was stumped as well for a while and then after we did some troubleshoot ing he remembered a possible fix and then he was able to walk me through an i nternal squelch setting that is in one of the setup pages. I think it has so lved the problem but I will wait on that definitive answer until I go and fl y again but I think we got it! > > Thanks, > > Bill Hunter > >> On Feb 5, 2018 12:58 PM, "Kelly McMullen" wrote: com> >> >> I strongly suggest calling Dynon directly. Their tech support is first ra te. Tech support best deals with specific problems over the phone, while the ir forum is better for general problems. >> The back up battery is 12 V, 12.25 when fully charged. >> I have same system, except SL30 and GTN 650, no Dynon radio, and PS Eng i ntercom/audio panel. >> >>> On 2/5/2018 9:45 AM, Charlie England wrote: >>>> On 2/5/2018 10:22 AM, William Hunter wrote: >>>> >>>> I am getting a continuous squelch type noise when I have one of the Dyn on screens receiving ships power. >>>> >>>> The Avionics system is two Skyview SV1000 displays, a Dynon radio, a Ga rmin GTN - 650, and an SL-15 audio panel. >>>> >>>> The squelch noise is continuous regardless if the engine is running or n ot so I have eliminated any noise from the alternator system. And I have als o disconnected any battery chargers so that the system is running only on ai rplane battery. I also turned off all shop lights >> >>> You said 'left side Dynon'. Do you have a pair? If so, can you swap unit s left/right & repeat the test? If the noise follows the box, then there's l ikely a defect in the box itself (probably has a 'switcher' power supply ins ide that's generating the white noise). If the internal backup battery is so mething lower than 12V, like a 4.5V or 6V battery, that would raise the odds that it's an internal switching type power supply generating the noise. >>> >>> If the noise doesn't follow the box, then I'd start looking at wiring. >>> >>> Charlie >>> >>> Vi rus-free. www.avast.com >>> >>> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >> ========================= >> - >> Electric-List" rel="noreferrer" target="_blank">http://www.matronics. com/Navigator?AeroElectric-List >> ========================= >> FORUMS - >> eferrer" target="_blank">http://forums.matronics.com >> ========================= >> WIKI - >> errer" target="_blank">http://wiki.matronics.com >> ========================= >> b Site - >> -Matt Dralle, List Admin. >> rel="noreferrer" target="_blank">http://www.matronics.com/contributio n >> ========================= >> >> >> ________________________________ Message 7 _____________________________________ Time: 06:08:27 PM PST US Subject: AeroElectric-List: Re: Z-13/8 inquiry From: "bcone1381" More Questions. I took a screen shot of a small part of the Z-10/8 wiring diagram. Focus with me on the bus tie between the Main Power Bus and the Endurance Bus. The Endurance Bus gets its primary feed from the Main Power bus thru the Diode, and its typical of the diagrams in AEC. This circuit is unprotected....no fuse, no circuit breaker, no current limiter, no fuse link. I guess thats ok., but seems abnormal. Can I have some feedback? I argue with myself that its because we want a reliable E-bus feed. Then I see that the diagrams in AEC fuse the Alternate Feed from the Hot Battery Bus. -------- Brooks Cone Bearhawk Patrol Kit Build Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477862#477862 Attachments: http://forums.matronics.com//files/pdf_screen_shot_2018_02_05_at_85452_pm_104.pdf ------------------------------------------------------------------------------------- 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.