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radio noise

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g-fizy

Joined: 27 May 2012
Posts: 46
Location: uk

Posted: Sun Apr 07, 2013 1:13 am Post subject: radio noise

My radio is not very clear on receive ,i was thinking of replacing it,but i was in the hanger yesterday to charge the battery .When i switched everything on the radio was crystal clear ,,so it must be the rotax 80hp causing the problem .

has any one got a few ideas where i should look ?



many thanks jim davis

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clivesutton

Joined: 23 Jan 2013
Posts: 187
Location: KENILWORTH

Posted: Sun Apr 07, 2013 2:03 am Post subject: Re: radio noise

Jim,



My experience is that the radio and the tacho are both sensitive to interference if they run alongside the cables to the mag anywhere.  I had just this problem a few months ago after 'tidying up' the wiring behind my panel.



If they do have to run close - like through the bulkhead, then I suggest it is better for them to run at 90 degrees to the mag cables to avoid/reduce inducing current in them, or that one or the other of them is double-screened and the screen earthed.  



That said, its also rather easy [for us amateurs?] to get poor BNC or other connector terminations in the screened radio cables themselves as the connections are a bit tricky to make without specialist and rather costly tools.



I hope that helps somehow

Clive Sutton

G-TAGR

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g-fizy

Joined: 27 May 2012
Posts: 46
Location: uk

Posted: Sun Apr 07, 2013 8:40 am Post subject: Re: radio noise

thanks Clive ,I never thought of connections and wire position i no their are some Redundant cables behind my panel, I mite have a spring clean 



regards jim

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davidjoyce(at)doctors.org
Guest

Posted: Sun Apr 07, 2013 10:02 am Post subject: radio noise

P.S. I notice that the sea temp between Dover & Calais is 

just 5.4 degrees today, some two and a half degrees colder 

than the minimum I recorded throughout the winter before I 

was planning to fly to Australia. Shows that March really 

has been cold, plus I guess that persistent NE winds blow 

the colder N Sea water into the Channel. And shows that X 

channel trips need serious preparation at this time of 

year!

David Joyce



On Sun,  7 Apr 2013 09:40:32 -0700

  "g-fizy" <jim.davis1(at)me.com> wrote:

 	  Quote: 	
		   

<jim.davis1(at)me.com>

 

 thanks Clive ,I never thought of connections and wire 

position i no their are some Redundant cables behind my 

panel, I mite have a spring clean 

 

 regards jim

 

 --------

 owner g-fizy

 

 

 

 

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 http://forums.matronics.com/viewtopic.php?p=398055#398055

 

 

 

 

 

 

 

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