X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wproxy.gmail.com ([64.233.184.204] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 985466 for flyrotary@lancaironline.net; Tue, 14 Feb 2006 22:21:07 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.233.184.204; envelope-from=russell.duffy@gmail.com Received: by wproxy.gmail.com with SMTP id i23so1224168wra for ; Tue, 14 Feb 2006 19:20:24 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:to:subject:date:message-id:mime-version:content-type:x-priority:x-msmail-priority:x-mailer:importance:x-mimeole:in-reply-to; b=iVS1RfpKDMrzqHjB8EXyC+Nl92pBCY2afbVl7yxpcCpDX/P/xlRsTNYZMVNjvRbWaJqCm4bI0aOUWwpCI6XvAhKHNcUNiC2Px43Vzacj2bgSyeP15OIWhLLcR+C5rBfoMcZ/puQH8sjGHGxr0bCWwYyJO8E60q6J0OqreA38AMI= Received: by 10.54.140.17 with SMTP id n17mr3715542wrd; Tue, 14 Feb 2006 19:20:24 -0800 (PST) Return-Path: Received: from rd ( [65.6.194.9]) by mx.gmail.com with ESMTP id 29sm450495wrl.2006.02.14.19.20.24; Tue, 14 Feb 2006 19:20:24 -0800 (PST) From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Radio noise Date: Tue, 14 Feb 2006 21:20:24 -0600 Message-ID: <008f01c631de$c2be7400$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0090_01C631AC.78240400" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0090_01C631AC.78240400 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Well, I just came from the hangar, 9PM and have not made any=20 progress. Tried everything suggested. Disconnected the radio/AP=20 grounds and run them directly to the battery - same problem Opened the AP and extra grounded the unit - Nada Everything that can make noise is making it? Capacitors as suggested by Chad, did not make any difference. I'll have to sleep on it. Too tired and frustrated. Buly Hi Buly, =20 I've coward away from this thread, mostly because of the potential to = get really complicated. However, I have had some significant alternator = noise on Val Com 760 radios in the past, and was told by Val to install a = noise choke that Radio Shack sells. It's part number 270-030A, which = consists of a small transformer, and cap that goes in the power wire that feeds the radio. This little choke kit was like magic for me, and several others = with Val radios (Rich will find one of these on his plane as well). =20 =20 Now, I don't know what radio you have, but if it's a Val, you need one = of these kits. If not, then it sure won't hurt, and could do some real = good. I'll also warn you that you won't find this part number online. When I looked for the one for the RV-3, I thought they might have discontinued = it, but it was hanging on the shelf at the store, even though it wasn't = online. =20 Good luck, Rusty (RF noise is not the MRI's friend) ------=_NextPart_000_0090_01C631AC.78240400 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Well, I just came from the hangar, 9PM and have not = made=20 any 
progress. Tried everything suggested. Disconnected the=20 radio/AP 
grounds and run them directly to the battery - same=20 problem
Opened the AP and extra grounded the unit - = Nada
Everything that=20 can make noise is making it?
Capacitors as suggested by Chad, did not = make=20 any difference.
I'll have to sleep on it. Too tired and=20 frustrated.
Buly

Hi=20 Buly,
 
I've = coward away from=20 this thread, mostly because of the potential to get really = complicated. =20 However, I have had some significant alternator noise on Val Com 760 = radios in=20 the past, and was told by Val to install a noise choke that Radio Shack=20 sells.  It's part number 270-030A,  which consists of a = small=20 transformer, and cap that goes in the power wire that feeds the = radio. =20 This little choke kit was like magic for me, and several others with Val = radios=20 (Rich will find one of these on his plane as well).  =
 
Now, I = don't know what=20 radio you have, but if it's a Val, you need one of these kits.  If = not,=20 then it sure won't hurt, and could do some real good.  I'll also = warn you=20 that you won't find this part number online.  When I looked for the = one for=20 the RV-3, I thought they might have discontinued it, but it was hanging = on the=20 shelf at the store, even though it wasn't online.  =
 
Good=20 luck,
Rusty = (RF noise is not=20 the MRI's friend)


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