Return-Path: Received: from pop3.olsusa.com ([63.150.212.2] verified) by logan.com (CommuniGate Pro SMTP 3.5b5) with ESMTP id 924327 for rob@logan.com; Wed, 17 Oct 2001 18:36:23 -0400 Received: from snipe.mail.pas.earthlink.net ([207.217.120.62]) by pop3.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-71866U8000L800S0V35) with ESMTP id com for ; Wed, 17 Oct 2001 03:46:16 -0400 Received: from f3g6s4 (sdn-ar-012orportP270.dialsprint.net [63.180.48.72]) by snipe.mail.pas.earthlink.net (8.11.5/8.9.3) with SMTP id f9H7wLw07561 for ; Wed, 17 Oct 2001 00:58:21 -0700 (PDT) Message-ID: <000b01c156e2$10e00900$4830b43f@f3g6s4> Reply-To: "Dan Schaefer" Reply-To: lancair.list@olsusa.com From: "Dan Schaefer" To: "Lancair list" Subject: First experience with static? Date: Wed, 17 Oct 2001 01:02:26 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Mailing-List: lancair.list@olsusa.com <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> To Harry Hapgood, re: com radio range. 50 miles out at 5000 ft ain't all that bad, Harry. However, if you believe it should get more, take your airplane to a reputable avionics shop and have the tech check you comm antenna's VSWR. This measurement will tell you how well your com radio is matched to the antenna. A lousy VSWR (ratio = 1:1 is perfect and probably impossible to attain) is usually an artifact of the antenna design but many other things can screw it up - such as squashed or kinked cables, bad connection to the antenna and/or the radio and faulty cable. A high VSWR will mostly affect the transmitter but if it's really bad, the receiver can be bothered too. In my Lancair, I've noticed that my transmitter, and occasionally the receiver, exhibit some directional sensitivity. That is, ATC sometimes will report that they can't read me and when I make a turn either way of , say 45 degrees, they hear me 5 by 5. This only happens on some frequencies and it happens to be in the part of the band where my VSWR is highest (it'll vary depending on the frequency being used). I'm using a Bob Archer antenna for comm and though it's quite good, there are some quirks. Dan Schaefer >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>