Hi Troy,
How are you powering the iPad? If you are using a cigarette lighter socket
with a cheap USB power converter it could be generating a large amount of
noise . Try running the iPad off its internal battery to see of this is the
case.
Before diving into the wiring and checking for bad connections/ bad earths
it is always worth standing back and saying "what have I changed?" It is
then a good idea to get a pal to communicate with you on an unused frequency
using a hand held to help you trouble shoot. First try switching things off
in a systematic way to see what makes a difference. Try switching off the
intercom. Most intercoms have a direct radio transmit feature to allow for
intercom failure.
Good luck!
Brian Davies
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Troy Maynor
Sent: 28 April 2014 03:26
Subject: Europa-List: Noisy Comm Radio
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.
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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