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Bad radio reception

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luchetto View Drop Down
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    Posted: 21 Aug 2017 at 4:10pm
For whatever reason both the 540 and 440 radio reception quality has noticeably deteriorated after a magneto repair. I had a problem with the tower frequency 118.10 as I did not hear them when they called me. The reception was random so Zürich tower sent me back to the parking position as I was holding up the commercial operations. all other frequencies were ok.

I taxied back but didn't want to give in so I tried another headset and now I was able to hear the tower again. I convinced them that I had resolved the issue and asked to depart and reluctantly they let me go. All seemed ok but shortly after taking off the reception started to deteriorate. I was getting all calls but there was a rattling that was getting stronger the farther I was getting. When they allowed the frequency change I was barely able to read them. I never had this issue before. I have had a bad magneto which was repaired and now I have this radio issue. Could there be a connection between the two things? What can I do to resolve the problem?

Thanks for your help.
Placido
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brou0040 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote brou0040 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Aug 2017 at 10:31am
http://forums.avidyne.com/forum_posts.asp?TID=1351&title=ifd-540-reception
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AUXAIR View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AUXAIR Quote  Post ReplyReply Direct Link To This Post Posted: 22 Aug 2017 at 11:10am
Yes, it COULD be related.  Aviation spark plug wires are shielded to reduce interference from the sparks created by the magnetos.  If the shielding was not properly re-connected or the wiring updated if deteriorated, then it could result in interference into the aviation AM radio reception
David E.
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AUXAIR View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AUXAIR Quote  Post ReplyReply Direct Link To This Post Posted: 22 Aug 2017 at 11:16am
Additionally -

To check to see if there is a problem, have someone take a hand-held aircraft radio and stand beside the aircraft as it is started.  (Keep out of the propeller arc!!)  What are the results on the hand-held? 

If loud static is detected by the hand-held, further trouble-shooting can be done by having your mechanic take the handheld and see where the loudest static occurs in the engine area.  That might be a source of the problem.
David E.
Cessna 182 RG II
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