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1. 01:15 AM - Re: Radio Interference (Bob Verwey)
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| Subject: | Re: Radio Interference |
Thanks Charlie this is bankable info
On Sat, 02 Mar 2024, 23:59 Charlie England, <ceengland7@gmail.com> wrote:
> 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 oth
er
> 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, eve
n
> 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'.
>
>
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> 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
>> to 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
>>
>
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