X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 17 Apr 2006 00:59:26 -0400 Message-ID: X-Original-Return-Path: Received: from ms-smtp-04.texas.rr.com ([24.93.47.43] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1070270 for lml@lancaironline.net; Sun, 16 Apr 2006 20:30:46 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.93.47.43; envelope-from=toucan@Satx.rr.com Received: from VAIO (cpe-24-243-1-103.satx.res.rr.com [24.243.1.103]) by ms-smtp-04.texas.rr.com (8.13.6/8.13.6) with SMTP id k3H0SElm017717 for ; Sun, 16 Apr 2006 19:28:14 -0500 (CDT) X-Original-Message-ID: <003601c661b5$cceae9c0$6701f318@VAIO> From: "James Cameron" X-Original-To: "Lancair Mailing List" Subject: Wiring: ground or return tricks X-Original-Date: Sun, 16 Apr 2006 19:28:07 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0033_01C6618B.E3A4BAD0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0033_01C6618B.E3A4BAD0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Good discussion on circuit returns, otherwise known to most of us as = "grounding." A very good aid for proper wiring is Bob Nuckolls' "forest = of tabs," available from B&C Electronics. It's a pair of brass plates, = one for each side of the firewall, with a brass bolt to connect through. = Each plate has a number of male Fast-On tabs soldered to it; the pair I = like has 48 tabs on the aft (cabin) side and 24 on the foreward side. = You connect the bolt to the battery negative with your main bus wire = (2/0 or so in size), then make ALL your return (ground) connections to = these plates. With this single-point ground arrangement you will have = much quieter radio and intercom performance. If you run out of tabs, = you can bunch up several wires in one crimped female connector. So long = as this is the first place the return signal wires come together, all = will be well. Having the tabs on the firewall side also reduces the = number of wires that must come through the firewall. Bob Nuckolls has also put together a book on wiring experimental = aircraft. Highly recommended and also available from B&C. Jim Cameron Boerne, TX ------=_NextPart_000_0033_01C6618B.E3A4BAD0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
    Good discussion on circuit = returns,=20 otherwise known to most of us as "grounding."  A very good aid for = proper=20 wiring is Bob Nuckolls' "forest of tabs," available from B&C=20 Electronics.  It's a pair of brass plates, one for each side of the = firewall, with a brass bolt to connect through.  Each plate has a = number of=20 male Fast-On tabs soldered to it; the pair I like has 48 tabs on the aft = (cabin)=20 side and 24 on the foreward side.  You connect the bolt to the = battery=20 negative with your main bus wire (2/0 or so in size), then make = ALL=20 your return (ground) connections to these plates.  With = this=20 single-point ground arrangement you will have much quieter radio = and=20 intercom performance.  If you run out of tabs, you can bunch up = several=20 wires in one crimped female connector.  So long as this is the = first place=20 the return signal wires come together, all will be well.  Having = the tabs=20 on the firewall side also reduces the number of wires that must come = through the=20 firewall.
 
   Bob Nuckolls has also put together a = book on=20 wiring experimental aircraft.  Highly recommended and also = available from=20 B&C.
 
Jim Cameron
Boerne, TX
 
 
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