X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [66.219.56.248] (HELO qnsi-xch.qnsi.net) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 987277 for flyrotary@lancaironline.net; Thu, 16 Feb 2006 09:03:53 -0500 Received-SPF: none receiver=logan.com; client-ip=66.219.56.248; envelope-from=bhughes@qnsi.net Content-class: urn:content-classes:message Return-Receipt-To: "Bobby J. Hughes" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Disposition-Notification-To: "Bobby J. Hughes" X-MimeOLE: Produced By Microsoft Exchange V6.5.6944.0 Subject: RE: [FlyRotary] Radio noise saga Date: Thu, 16 Feb 2006 08:04:26 -0600 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Radio noise saga Thread-Index: AcYypoZwxIvj7PW5RCmw4qJoA81gzAAWt7gg From: "Bobby J. Hughes" To: "Rotary motors in aircraft" Buly, I would bet you found the problem. DC power leads should always be run as a pair. A nice uniform twist is also good but I do not remember how many twist per foot is recommend.=20 Bobby=20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bulent Aliev Sent: Wednesday, February 15, 2006 9:09 PM To: Rotary motors in aircraft Subject: [FlyRotary] Radio noise saga Just came back from the hangar. My hangar neighbor is a electrical engineer and was helping me. Tried few things: Checked all the pinouts on the RST AP and everything was fine Powered the AP and radio with a separate battery independent from the planes + and- : No change Installed the 20A Radio Shack filter Bob Nuckols recommended: No change BTW Radio Shack has discontinued all the noise suppressors that we can use. I found one left over. Than I checked with my handheld and my headset inside the cockpit. No connections of any kind to the plane. With squelch on high gain, I can hear all the noises. Than it hit me: there is an antenna radiating all the noises. Bob Nuckols warned against use of wire conduits in both side of the plane. When I moved the batteries to the nose from the spar a month ago, I run two #2 wires the whole length of the fuselage to the firewall. =20 Being nervous having positive and neg. in the same conduit, I run one in each side. So, I think I created a very good antenna. I have a long HD battery jumper cable ready to test instead of both cables in place now, but I got hungry and tired and left it for tomorrow. Buly -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/