Dave, I have hear that placing a large 2000-4000? mfd capacitor on the power
lead of the alternator can reduce noise through out your electrical system.
Alternatively, You might try a .01 mfd capacitor across your power lead to
your intercom.

ED
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From: "DaveLeonard" <daveleonard@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, May 13, 2004 1:20 AM
Subject: [FlyRotary] Alternator noise


>
> Now that the engine is running well, I have a new problem.  Alternator
> noise.  The intercom is the main problem (victim).  When the intercom the
> alternator noise is quite noticeable, even annoying.  The noise goes away
> altogether when the intercom is off (i.e., when using the radio without
the
> intercom/audio panel).  If I turn off the alternator the noise mostly goes
> away, (I think the coils make a faint noise - but it is not significant.)
>
> The intercom/audio panel is the kit from RST.
>
> I was going to try an automotive filter on the power to the intercom.  Any
> other thoughts/suggestions?
>
> Thanks,
> Dave Leonard
>
>
>
>
>
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