Radio Troubled Europas:
I had exactly the same symptoms. I just replaced the entire antenna cable
and even more importantly, remade a new BNC connector (soldered type) into
my MGLV6 radio. This helped significantly to reduce the screeching noise.
Later this week I will replace the ROTAX912 regulator/rectifier which
introduced low frequency spikes to my bus. I hope this is the cure as the
spikes froze my radio and electric VSI as soon as RPM goes up.
Christoph Both
#223 TRI 912ULS 75+ hours
Nova Scotia, Canada
On 2014-04-29, 6:56 AM, "Frans Veldman" <frans@privatepilots.nl> wrote:
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>On 04/28/2014 04:25 AM, Troy Maynor wrote:
>> <wingnut54@charter.net>
>>
>> Hi All, I know this has been discussed before on the forum. I have
>> looked til I bleary eyed and can't find the answer I'm looking
>> for.
>
>Looks to me (experienced HAM) that you have a failure in your antenna
>or the coax cable. Get it checked with a SWR meter to see if it is
>still ok.
>If it is not ok it can cause the symptoms you described.
>The SWR of the antenna can also go wrong if you change something close
>to the antenna, like adding another antenna or a piece of metal.
>
>Frans
>
>
>> When I key the mike I have started getting a loud static noise or
>> feedback that wasn't there before. I have near radio silence of
>> incoming traffic until I am in the pattern and then it's scratchy.
>> It sounds ok with the engine off but I don't know how far I'm
>> transmitting or receiving on the ground. I am running an ICOM A200
>> and Bob Archer antenna. The antenna is mounted on the fuselage wall
>> behind the D panel port side. It has always performed well until
>> recently but can't pin down what has changed. I have checked the
>> security of all the grounds on and forward of the firewall, as far
>> as I can tell. I was thinking it is time to pull the instrument
>> panel but got to thinking about these torroids or suppressors. Can
>> I just string some of these onto the RG58 coax back near the
>> antenna and maybe help matters? I'd really appreciate any pointers
>> to look at specifically. I have a Sigtronics intercom with the
>> music switcher also. Can the presence of an IPAD communicating with
>> a Stratus ADSB cause this? Most of what I found on the forum dealt
>> with the transmitter affecting other equipment. This is not the
>> case. I am hearing huge noise when I key the mike and can't here
>> others calling me until I'm very near, like in the landing pattern.
>> I can also hear the electric gyros in the headsets a little but
>> that has always been there but not too noticeable, a little pop
>> from the strobes faintly, but I can live with that. I just need to
>> kill the giant, not the little noises necessarily. I'd like to
>> figure out what change took place. Thanks, Troy Maynor 240 TT hours
>> to date
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=422480#422480
>>
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