Mailing List flyrotary@lancaironline.net Message #30209
From: Ernest Christley <echristley@nc.rr.com>
Subject: Re: [FlyRotary] Radio noise
Date: Tue, 14 Feb 2006 10:14:50 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Bulent Aliev wrote:

Here is a problem for you large brained engineers:
My radio is picking up noise from all the electrical motors including  the alternator. I took the alternator to the shop and checked "as  new". When I disconnect the coax from the radio, the noises stop,  which leads me to believe the antenna coax is picking up the  interference somehow. Guy at the airport suggested a clamp-on ferrite  filter on the coax. I bought one tonight, but did not have time to  test it.
The offenders are: fuel pumps, nose gear motor and alternator.
Any Ideas?


The fact that you have multiple antagonist leads me to believe that you might not have a common ground for your radios.  90% of radio noise problems are eliminated by simply bringing all avionics grounds to a single point.

--
        ,|"|"|,               Ernest Christley     |
----===<{{(oQo)}}>===----     Dyke Delta Builder    |
       o|  d  |o          www.ernest.isa-geek.org  |
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