X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ispmxmta06-srv.alltel.net ([166.102.165.167] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1062234 for flyrotary@lancaironline.net; Sat, 08 Apr 2006 07:48:11 -0400 Received-SPF: pass receiver=logan.com; client-ip=166.102.165.167; envelope-from=jskmberki@alltel.net Received: from joehomepc ([71.31.135.23]) by ispmxmta06-srv.alltel.net with SMTP id <20060408114724.XMWL12807.ispmxmta06-srv.alltel.net@joehomepc> for ; Sat, 8 Apr 2006 06:47:24 -0500 Message-ID: <001a01c65b02$30313030$01fea8c0@joehomepc> From: "Joe Berki" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Radio Saga Beginning Date: Sat, 8 Apr 2006 07:47:17 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0017_01C65AE0.A8C3DBA0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1506 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1506 This is a multi-part message in MIME format. ------=_NextPart_000_0017_01C65AE0.A8C3DBA0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Joe, Chasing down noise is difficult without seeing a schematic or the plane. = If it is conducted emissions it's coming in on the power to the = intercom. If it is radiated you might have audio wires running close to = ignition or engine type signals. I twisted each pair of wires on my = project. I also used shielding. I would try a filter on the power to = the intercom. Joe Berki Limo EZ ----- Original Message -----=20 From: Bulent Aliev=20 To: Rotary motors in aircraft=20 Sent: Saturday, April 08, 2006 1:20 AM Subject: [FlyRotary] Re: Radio Saga Beginning Beats me Joe? I was also like a babe in the woods with my radio, until = I installed a new Icom and small and simple intercom. Now is perfect. = RST is on my desk ready for Ebay. My fuel pumps used to make lots of noise also? Buly On Apr 8, 2006, at 12:11 AM, Joe Hull wrote: Hey Buly (and anyone else) I=92ve got an RST intercom and an ICOM radio (don=92t remember the = number but only 1 year old). When the engine is off I can hear and Xmit = fine. Turn the engine on and I can still hear fine (i.e. no noise) but = when I key the mic there is a ton of noise in my headset and in the = broadcast. It=92s not high pitched just a mid-range noise. I ruled out the alternator by taking the belt off =96 noise was = still there. So why noise only when I transmit? Any thoughts? Joe Hull Cozy Mk-IV #991 (Done Building! In Phase1 Flight Test - 0 hrs flown) Redmond (Seattle), Washington ------=_NextPart_000_0017_01C65AE0.A8C3DBA0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Joe,
Chasing down noise is difficult without = seeing a=20 schematic or the plane.  If it is conducted emissions it's coming = in on the=20 power to the intercom.  If it is radiated you might have audio = wires=20 running close to ignition or engine type signals.  I twisted each = pair of=20 wires on my project.  I also used shielding.  I would try a = filter on=20 the power to the intercom.
 
Joe Berki
Limo EZ
----- Original Message -----
From:=20 Bulent=20 Aliev
Sent: Saturday, April 08, 2006 = 1:20=20 AM
Subject: [FlyRotary] Re: Radio = Saga=20 Beginning

Beats me Joe? I was also like a babe in the woods with my radio, = until I=20 installed a new Icom and  small and simple intercom. Now is = perfect. RST=20 is on my desk ready for Ebay.
My fuel pumps used to make lots of noise also?
Buly

On Apr 8, 2006, at 12:11 AM, Joe Hull wrote:

Hey Buly (and anyone=20 else)

I=92ve got an RST = intercom and an=20 ICOM radio (don=92t remember the number but only 1 year old).  = When the=20 engine is off I can hear and Xmit fine. Turn the engine on and I can = still=20 hear fine (i.e. no noise) but when I key the mic there is a ton of = noise in=20 my headset and in the broadcast. It=92s not high pitched just a = mid-range=20 noise.

I ruled out the = alternator by=20 taking the belt off =96 noise was still there.

So why noise only when = I=20 transmit? Any thoughts?

Joe = Hull

Cozy Mk-IV = #991 (Done=20 Building! In Phase1 Flight Test - 0 hrs flown)

Redmond=20 (Seattle), = Washington


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