Today's Message Index:
----------------------
1. 01:56 PM - Re: Radio Interference (Charlie England)
2. 08:07 PM - Re: Radio Interference (user9253)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 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'.
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_c
ampaign=sig-email&utm_content=webmail>
Virus-free.www.avast.com
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_c
ampaign=sig-email&utm_content=webmail>
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
On Fri, Mar 1, 2024 at 6:39=AFPM <mike@vision499.com> 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
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Radio Interference |
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
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|