X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao09.cox.net ([68.230.241.30] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1062493 for flyrotary@lancaironline.net; Sat, 08 Apr 2006 16:32:50 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.30; envelope-from=dale.r@cox.net Received: from [192.168.1.104] (really [68.2.139.17]) by fed1rmmtao09.cox.net (InterMail vM.6.01.05.02 201-2131-123-102-20050715) with ESMTP id <20060408203204.QWHX25099.fed1rmmtao09.cox.net@[192.168.1.104]> for ; Sat, 8 Apr 2006 16:32:04 -0400 Message-ID: <44381DC1.7010902@cox.net> Date: Sat, 08 Apr 2006 13:32:01 -0700 From: Dale Rogers User-Agent: Thunderbird 1.5 (Windows/20051201) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Radio Saga Beginning References: In-Reply-To: Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Joe Hull wrote:

... However, remember it is only when the engine is running – and also remember that in a Cozy that bad boy is 8 feet from the instrument panel. So, since it’s only there when the mic is keyed it has to be something that gets energized on the PTT ground wire or on Mic cable only when the engine is going.

Ah, and what else is running when the engine is? Alternator, for one. Does the noise
fall off proportional to engine speed, if you kill the engine while transmitting?

Dale R.
COZY MkIV #1254