---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 03/02/24: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:56 PM - Re: Radio Interference (Charlie England) 2. 08:07 PM - Re: Radio Interference (user9253) ________________________________ Message 1 _____________________________________ Time: 01:56:33 PM PST US From: Charlie England Subject: Re: AeroElectric-List: Radio Interference Not knowing that particular engine's characteristics makes it even more difficult to remotely troubleshoot. But here are some generic things to think about. One thought (but not easiest to check) would be the condenser in the mag. (If it *is* the condenser, you'll be putting points in the mag soon. ;-) ) If the mags are the same or similar to each other, you might be able to swap the condensers between the mags to see if the noise moves to the other mag. Depending on the plug wire and plug specs, you could have damaged shielding on a plug wire, and/or if the engine uses resistor plugs like a Lyc, you might have a plug going bad. Then there's the possibility of grounding issues with that mag. Have you done a recent mag check before shutting down to be sure that killing both mags actually kills the engine? Depending on how the plane is wired, even that might not tell you if a P-lead shield is ungrounded. Has anything else changed in the wiring of the plane in general? If so, the work could have either removed a needed ground path or added one that wasn't there before, resulting in a 'ground loop' that is affecting the comm. Just shots in the dark; about the best that can happen 'long distance'. Virus-free.www.avast.com <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Fri, Mar 1, 2024 at 6:39=AFPM wrote: > I have a LOM M332 aircraft engine with 2 factory magnetos and an MGL V16 > radio. > > Antenna is copper foil with balun epoxied into the VS > > There are no filters installed. > > While listening to ATIS (118.1) there is a ticking sound that is linked t o > the right magneto, it goes away when right mag is switched off. > > No noise when running only on left mag > > While listening to ATIS I can also hear static that is not there on the > other frequencies > > I cannot be 100% certain but I think the noise is new. > > This noise is not present when listening to Tower (121.9) > > Any ideas on what could cause this > > > Thanks > > > Mike > ________________________________ Message 2 _____________________________________ Time: 08:07:16 PM PST US Subject: AeroElectric-List: Re: Radio Interference From: "user9253" Try listening using a hand-held radio running on its own internal battery power. If there is no ignition noise on the hand-held radio, then it can be assumed that the noise in the aircraft radio is coming through the aircraft electrical system. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=513332#513332 ------------------------------------------------------------------------------------- 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.