X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from vms048pub.verizon.net ([206.46.252.48] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1062244 for flyrotary@lancaironline.net; Sat, 08 Apr 2006 08:26:28 -0400 Received: from verizon.net ([71.99.147.102]) by vms048.mailsrvcs.net (Sun Java System Messaging Server 6.2-4.02 (built Sep 9 2005)) with ESMTPA id <0IXE00H7LL7KYXY1@vms048.mailsrvcs.net> for flyrotary@lancaironline.net; Sat, 08 Apr 2006 07:26:09 -0500 (CDT) Date: Sat, 08 Apr 2006 08:25:36 -0400 From: Finn Lassen Subject: Re: [FlyRotary] Radio Saga Beginning In-reply-to: To: Rotary motors in aircraft Message-id: <4437ABC0.8040904@verizon.net> MIME-version: 1.0 Content-type: multipart/alternative; boundary=------------070708090801090803060609 X-Accept-Language: en-us, en References: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) This is a multi-part message in MIME format. --------------070708090801090803060609 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit That wouldn't be prop (wind) and engine noise by any chance? You're sitting inside the airplane with the canopy closed? Try a different headset (different mic). Finn Joe Hull wrote: > Hey Buly (and anyone else) > > I've got an RST intercom and an ICOM radio (don't 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's not high pitched just a mid-range noise. > > I ruled out the alternator by taking the belt off - 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 > > > --------------070708090801090803060609 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit That wouldn't be prop (wind) and engine noise by any chance?
You're sitting inside the airplane with the canopy closed?
Try a different headset (different mic).

Finn


Joe Hull wrote:

Hey Buly (and anyone else)

I’ve got an RST intercom and an ICOM radio (don’t 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’s not high pitched just a mid-range noise.

I ruled out the alternator by taking the belt off – 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

 

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