X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 40 [XX] Return-Path: Sender: To: lml Date: Sat, 13 Jan 2007 16:06:21 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d22.mx.aol.com ([205.188.144.208] verified) by logan.com (CommuniGate Pro SMTP 5.1.4) with ESMTP id 1756941 for lml@lancaironline.net; Sat, 13 Jan 2007 15:40:18 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.208; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d22.mx.aol.com (mail_out_v38_r7.6.) id q.d10.2b51368 (39332) for ; Sat, 13 Jan 2007 15:39:29 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: X-Original-Date: Sat, 13 Jan 2007 15:39:26 EST Subject: Re: [LML] Re: Connectors X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1168720766" X-Mailer: 9.0 Security Edition for Windows sub 5358 X-Spam-Flag: NO -------------------------------1168720766 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Everybody is almost correct (no, I am not a lawyer). Some connections will be soldered - Microphone and headset jacks, D-subs that come soldered from a component manufacturer where you want to add a wire, etc. Some connectors are crimped, such as the fast-ons used to connect to the gear-locked micro-switches. Some fancy plug to socket connectors are best served by gold pins crimped with fancy tools. Some less important connections may be satisfied with simple Molex connectors and crimped pins. Some connections are done with crimped and/or soldered terminals, like those to circuit breakers. Some connectors are insulated, some connections have shrink tubing affixed. Some terminations are ring, some fast-on and some soldered if rigid. What is common to the success (other than cleanliness, good tools, use of pookie, etc.) of any of these connections is their support in an environment of constant vibration. In other words, wires from terminals and connectors must be supported, sometimes in bundles, to reduce the effect of vibration. Soldered connections most often fail where the solder ends and the vibration work hardens and finally breaks the wire - The same can happen to a crimped connector without support (some is provided by heat shrink). Perhaps reading some of the material at _http://www.aeroelectric.com/articles.html_ (http://www.aeroelectric.com/articles.html) can help choose how to make terminations. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) A man has got to know his limitations. -------------------------------1168720766 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Everybody is almost correct (no, I am not a lawyer).

Some connections will be soldered - Microphone and headset jacks, D-sub= s=20 that come soldered from a component manufacturer where you want to add a wir= e,=20 etc.

Some connectors are crimped, such as the fast-ons used to connect to th= e=20 gear-locked micro-switches.

Some fancy plug to socket connectors are best served by gold pins=20 crimped with fancy tools.

Some less important connections may be satisfied with simple Molex=20 connectors and crimped pins.

Some connections are done with crimped and/or soldered terminals, like=20 those to circuit breakers.

Some connectors are insulated, some connections have shrink tubing=20 affixed.

Some terminations are ring, some fast-on and some soldered if rigid.

What is common to the success (other than cleanliness, good tools,= use=20 of pookie, etc.) of any of these connections is their support in an=20 environment of constant vibration. In other words, wires from terminal= s=20 and connectors must be supported, sometimes in bundles, to reduce the effect= of=20 vibration. Soldered connections most often fail where the solder ends=20= and=20 the vibration work hardens and finally breaks the wire - The same can happen= to=20 a crimped connector without support (some is provided by heat shrink).

Perhaps reading some of the material at http://www.aeroelectric.c= om/articles.html =20 can help choose how to make terminations.

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

A m= an=20 has got to know his limitations.

-------------------------------1168720766--