Return-Path: Received: from s1.optonline.net ([167.206.112.6]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Thu, 21 Sep 2000 22:55:59 -0400 Received: from barkerasset (ool-18bf96f1.dyn.optonline.net [24.191.150.241]) by s1.optonline.net (8.10.2/8.10.2) with SMTP id e8M32s209889 for ; Thu, 21 Sep 2000 23:02:54 -0400 (EDT) Message-ID: <002501c02442$11d6b8a0$f196bf18@barkerasset> From: "Robert R Barker" To: References: <69.abcf5a7.26fbb2da@aol.com> Subject: Re: Vision Micro problems Date: Thu, 21 Sep 2000 23:06:15 -0400 X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> ----- Original Message ----- From: I presume you can duplicate the problem on the ground. Try this. Disconnect the primary lines to the NAVCOM. In their place run heavy gauge wire directly from the transmitter to your battery. Now when you key the transmitter the heavy current draw that occurs with transmission cannot pull down the voltage or rob current from any of those various other instruments that are being disturbed during transmission. If you don't get the disturbance with this dedicated test wire in place, restore the original connections and use a sensitive voltmeter to find where the major drop is along the circuit from the battery to the transmitter. It does not have to be in a component. It could be as simple as a wire in the feed line that is adequate for all but the heavy loads demanded by the transmitter. As soon as you press the PTT the xmitter sends a carrier signal and draws very heavy current. It is not necessary to activate the VOX circuit with mic input to initiate the load. I would run both ground and high side dedicated test lines for a comprehensive test. It may help during your experimenting to think of current as the amount of electricity and voltage as the pressure with which the amount is being delivered. Good luck Bob Barker >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>