---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 12/20/21: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:31 AM - Re: Static On GTN-650 (William Hunter) 2. 09:29 AM - Re: Static On GTN-650 (Robert L. Nuckolls, III) 3. 09:31 AM - Re: Static On GTN-650 (eschlanser) 4. 10:08 AM - Re: Static On GTN-650 (William Hunter) 5. 10:35 AM - Re: ****SPAM**** Re: Low voltage warning light (Peter Pengilly) 6. 10:52 AM - Re: Static On GTN-650 (Charlie England) 7. 03:07 PM - Re: Re: Low voltage warning light (DANIEL PELLETIER) 8. 07:43 PM - Re: Low voltage warning light (user9253) ________________________________ Message 1 _____________________________________ Time: 08:31:48 AM PST US From: William Hunter Subject: Re: AeroElectric-List: Static On GTN-650 >but the biggest fix was adding some noise filters to the lights. Is there a filter available for purchase specific to this type of problem? THANKS Bill On 12/17/2021 6:03 PM, Sebastien wrote: > but the biggest fix was adding some noise filters to the lights. ________________________________ Message 2 _____________________________________ Time: 09:29:41 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Static On GTN-650 At 10:30 AM 12/20/2021, you wrote: > >but the biggest fix was adding some noise filters to the lights. > >Is there a filter available for purchase specific to this type of problem? So you know how the noise is getting into the avionics? Through the antenna(s), ground loops or conducted power? Refresh my memory, what combination of lights/power supplies are being discussed? Way back when, the BuckPuck was a popular but noisy power supply for some DIY nav lights. We crafted a filter assembly for that product which sold rather well for a time. http://aeroelectric.com/Pictures/Lighting/Buck-Puck/ This was for radiated noise that found it's way in through antennas. I've got some residual ecbs around here for another filter that used surface mounted parts that also tamed radiated noise from some auto-led conversions installed as landing/taxi lights. Bob . . . Un impeachable logic: George Carlin asked, "If black boxes survive crashes, why don't they make the whole airplane out of that stuff?" ________________________________ Message 3 _____________________________________ Time: 09:31:56 AM PST US Subject: AeroElectric-List: Re: Static On GTN-650 From: "eschlanser" cluros(at)gmail.com wrote: > We had the same problem with our amazon lights making noise in the intercom. Better headsets helped, finding one wiring problem in the intercom wiring helped, but the biggest fix was adding some noise filters to the lights. Here's the little filter box I made. It's not a great diagram, the box around the electronics is not wiring, it's a box. > [/quote] Can anyone help me understand what the component symbols and numbers in the diagram refer to? I understand that they refer to components in the diagram, but what are they? I could not find them in review of electrical component symbols and the associated numbers. A picture of the completed device would help a DIY builder understand it. if its not too much trouble. As the OP asked, if anyone is aware of a reference to a commercially available device, it would be appreciated. I'm a little surprised that the GTN 650 would be susceptible to such interference. I wonder if the Garmin help technicians have anything to say about it? Many years ago, my little GPS 92 would go blank whenever I tuned the nav radio to our home field VOR frequency. Astonishingly, the Garmin help tech denied such a thing could be happening. Thanks,Eric Read this topic online here: http://forums.matronics.com/viewtopic.php?p=505314#505314 ________________________________ Message 4 _____________________________________ Time: 10:08:13 AM PST US From: William Hunter Subject: Re: AeroElectric-List: Static On GTN-650 >So you know how the noise is getting into the avionics? Through the antenna(s), ground loops or conducted power? I do not how the noise is getting to the GTN. >Refresh my memory, what combination of lights/power supplies are being discussed? The fiberglass airplane has a B&C alternator and it feeds power to two "ships power" copper bus bars with Klixon circuit breakers and one of these circuit breakers feeds the LED landing light. The avionics copper bus bar gets its power from one of the ships power copper bus bars through a LT-100 Honeywell switch that feeds the avionics copper bus bar that powers the GTN, transponder, ADS-B, and the SL-15 audio panel. The switch panel for aircraft lighting is in the overhead and the power from the overhead switch panel is routed in a different location than the GTN radio unit and power wires however there is one location where the LED power and ground wires will cross the antenna coax cable for the radio however the wires do not run parallel to the coax cable just at a 90 degree angle. The audio panel is a SL-15 and I have a Dynon radio that is quiet when the LED landing light is turned on. If I select the GTN for the transmit/receive then I hear the static. When I turn off the landing light switch the static stops. How would one (me) be able to determine the source of the static? The lights in question are theses: https://www.amazon.com/gp/product/B01H6Z2XZ6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Again...always grateful for the help!!! On 12/20/2021 10:29 AM, Robert L. Nuckolls, III wrote: > At 10:30 AM 12/20/2021, you wrote: >> >but the biggest fix was adding some noise filters to the lights. >> >> Is there a filter available for purchase specific to this type of >> problem? > > So you know how the noise is getting into the avionics? > Through the antenna(s), ground loops or conducted power? > Refresh my memory, what combination of lights/power supplies > are being discussed? > > Way back when, the BuckPuck was a popular but noisy > power supply for some DIY nav lights. We crafted > a filter assembly for that product which sold rather > well for a time. > > http://aeroelectric.com/Pictures/Lighting/Buck-Puck/ > > This was for radiated noise that found it's way > in through antennas. I've got some residual > ecbs around here for another filter that used > surface mounted parts that also tamed radiated > noise from some auto-led conversions installed > as landing/taxi lights. > > > Bob . . . > > Un impeachable logic: George Carlin asked, "If black boxes > survive crashes, why don't they make the whole airplane > out of that stuff?" > ________________________________ Message 5 _____________________________________ Time: 10:35:10 AM PST US From: "Peter Pengilly" Subject: RE: ****SPAM**** Re: AeroElectric-List: Low voltage warning light > A few years ago I bought a self-contained large LED from Perihelion Design, but that is no longer available From: owner-aeroelectric-list-server@matronics.com On Behalf Of DANIEL PELLETIER Sent: 20 December 2021 00:15 Subject: ****SPAM**** Re: AeroElectric-List: Low voltage warning light www.PerihelionDesign.com Envoy=C3=A9 de mon iPad Le 17 d=C3=A9c. 2021 =C3- 17:58, Bill Boyd > a =C3=A9crit : =EF=BB I have a spare yellow incandescent light from B&C designed to be used with their regulators. I used a pair of these regulators for my two-alternator design, and have the low voltage warning light powered only by the regulator for the backup alternator wired so that it extinguishes as long as the main alternator is online, putting out its higher set voltage. If you are using B&C or similar regulators, this bulb might be just what you need. Yours for an SASE if it can be of help to your project. Should show ok in this pic. -Bill B On Fri, Dec 17, 2021 at 5:26 PM Charlie England > wrote: On Fri, Dec 17, 2021 at 3:34 PM Peter Pengilly > wrote: I=99m looking for a low voltage warning light that illuminates at around 13.2 to 13.5 volts, can anyone recommend one? I like having a large, bright, low voltage warning light in my panel that indicates when the battery is supporting the electrical loads. A few years ago I bought a self-contained large LED from Perihelion Design, but that is no longer available and I have sold that aeroplane. My current aeroplane does not have a good warning system so I would like to buy another. I could build one from an op amp and a couple of resistors, but I=99m not that great with electronics and I=99ve got too much other stuff to do right now. The Perihelion unit was well packaged and easy to install. I would like to buy something similar. Can anyone recommend anything? Peter Hi Peter, Dan Horton (posts on Van's Air Force, and sometimes on HBA) recommended these modules, or a similar product, from TomTop: https://www.tomtop.com/p-e1021.html#flow_qa I bought a couple to play with a couple of years ago, but have never taken the time to experiment with them. The site says they're currently out of stock, but you might be able to find a similar product on the site. You'd still need to add your own display lamp or LED; the device just provides a set of 'dry' relay contacts. Depending on which alternator you're using, it may well have built-in low voltage detection; all you'd need to do in that case is hook up a wire to your warning light (the alternator drives an 'idiot light'). Charlie ________________________________ Message 6 _____________________________________ Time: 10:52:16 AM PST US Subject: Re: AeroElectric-List: Static On GTN-650 From: Charlie England snip > > How would one (me) be able to determine the source of the static? > snip If you have or can borrow a spare 12V battery (could be a small one), disconnect the feeder to the lights at the CB, and connect it to the spare battery. Ground the spare battery at the common ground point in the fuselage. If you power up the a/c and there's no noise in the radio, then the noise is likely coming in through the power wires. If you still have the noise, it's likely getting radiated & detected by the radio. -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 7 _____________________________________ Time: 03:07:10 PM PST US From: DANIEL PELLETIER Subject: Re: AeroElectric-List: Re: Low voltage warning light You can buy these on my website PerihelionDesign.com for $49.95. I have to charge shipping of $10.00. The standard is red, blinking or steady. Please specify. I can also supply other colors. Envoy de mon iPad > Le 19 dc. 2021 09:41, John M Tipton a crit : > > > Hi Peter - Its a pity 'Bob' doesn't produce his AEC9005-201 'Low Voltage' module any more, even the parts kit would be good for a home build project if it were available - John > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=505303#505303 > > > > > > > > > ________________________________ Message 8 _____________________________________ Time: 07:43:32 PM PST US Subject: AeroElectric-List: Re: Low voltage warning light From: "user9253" I don't see a low voltage warning light on PerihelionDesign.com -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=505321#505321 ------------------------------------------------------------------------------------- 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.