X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 15 Apr 2009 18:35:30 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d20.mx.aol.com ([205.188.139.136] verified) by logan.com (CommuniGate Pro SMTP 5.2.13) with ESMTP id 3581960 for lml@lancaironline.net; Wed, 15 Apr 2009 10:20:43 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.139.136; envelope-from=MikeEasley@aol.com Received: from imo-ma04.mx.aol.com (imo-ma04.mx.aol.com [64.12.78.139]) by imo-d20.mx.aol.com (v107.10) with ESMTP id RELAYIN3-449e5ed0621f; Wed, 15 Apr 2009 10:19:50 -0400 Received: from MikeEasley@aol.com by imo-ma04.mx.aol.com (mail_out_v40_r1.5.) id q.c29.55097619 (37084) for ; Wed, 15 Apr 2009 10:19:49 -0400 (EDT) Received: from MikeNotebook (c-76-25-136-43.hsd1.co.comcast.net [76.25.136.43]) by cia-db06.mx.aol.com (v123.3) with ESMTP id MAILCIADB066-90dc49e5ed041b9; Wed, 15 Apr 2009 10:19:49 -0400 X-Original-Date: Wed, 15 Apr 2009 08:19:27 -0600 From: mikeeasley Subject: Re: [LML] Re: spike suppresion diodes X-Original-To: "Lancair Mailing List" In-Reply-To: X-Original-Message-ID: <85d8ca53.1b51.4135.98a2.73f4ee3ab3c8@aol.com> References: X-Mailer: Nexus Desktop Client 3.1.20.1 MIME-Version: 1.0 Content-Type: MULTIPART/alternative; BOUNDARY=189e991d-9443-4392-9b4d-8477332496e8 Content-Transfer-Encoding: 8bit X-AOL-IP: 64.12.78.139 X-Spam-Flag:NO --189e991d-9443-4392-9b4d-8477332496e8 Content-Type: TEXT/plain; charset=us-ascii The Perihelion SnapJacks are very high quality and the best design, but the basic diodes are available at Radio Shack, 3A Part # 276-1144. 2 for $1.49. Any 1N540X diode will work fine. In a message dated 04/15/09 05:52:03 Mountain Daylight Time, n5zq@verizon.net writes: Consider these instead of diodes. http://www.periheliondesign.com/suppressors/SnapJack.pdf Bill Harrelson N5ZQ 320 1,650 hrs N6ZQ IV under construction ----- Original Message ----- From: terrence o'neill To: lml@lancaironline.net Sent: Wednesday, April 15, 2009 12:44 AM Subject: [LML] Re: spike suppresion diodes Hi Gene, The post from Scott and the schematic doesn't have the spec for the diode on it, but I recall talking to a local electronic guru who assured me that a diode from Radio Shack would work to prevent the high voltage spikes... but that info is at the airport. The problem I had was because I had wired the landing gear so that I could pull the breaker for the hydraulic pump, while the master eminedremained on. The master runs continuous 12v through the solenoids, which are not continuous duty, and I melted the down solenoid, while adjusting the gear light switches. That caused me to realize that what Scott said was true.... the only way to prevent this happening was to wire the solenoids after the big 50a breaker for the hydraulic motor ... which I did. Thus, as soon as the pump increases the pressure enough the pressure switches cut off voltage to the solenoids. I also replaced the melted solenoid. And to obviate the spikes, wired a diode into the plus side of the solenoid... will check the diode tomorrow at the airport. Terrence L235/320 N211AL ----- Original Message ----- From: genemartin To: lml@lancaironline.net Sent: Tuesday, April 14, 2009 20:06 Subject: [LML] spike suppresion diodes Does anyone have a part# for the Diodes. I was going to place a order with Mouser but am overwhelmed by the 20 some pages of diodes. Terrence you posted you saved a schematic from Scott K. could you or Scott post that again, I remember seeing it and thought I saved it but can't find it . Gene Martin LNC2/320 --189e991d-9443-4392-9b4d-8477332496e8 Content-Type: TEXT/html; charset=utf-8 Content-Transfer-Encoding: 8BIT
The Perihelion SnapJacks are very high quality and the best design, but the basic diodes are available at Radio Shack, 3A Part # 276-1144. 2 for $1.49.  Any 1N540X diode will work fine.
 
In a message dated 04/15/09 05:52:03 Mountain Daylight Time, n5zq@verizon.net writes:
 
Bill Harrelson
N5ZQ 320 1,650 hrs
N6ZQ  IV under construction
 
 
 
 
----- Original Message -----
Sent: Wednesday, April 15, 2009 12:44 AM
Subject: [LML] Re: spike suppresion diodes

Hi Gene,
 
The post from Scott and the schematic doesn't have the spec for the diode on it, but I recall talking to a local electronic guru who assured me that a diode from Radio Shack would work to prevent the high voltage spikes... but that info is at the airport.
The problem I had was because I had wired the landing gear so that I could pull the breaker for the hydraulic pump, while the master eminedremained on.  The master  runs continuous 12v through the solenoids, which are not continuous duty, and I melted the down solenoid, while adjusting the gear light switches.
That caused me to realize that what Scott said was true.... the only way to prevent this happening was to wire the solenoids after the big 50a breaker for the hydraulic motor ... which I did.  Thus, as soon as the pump increases the pressure enough the pressure switches cut off voltage to the solenoids.
I also replaced the melted solenoid.  And to obviate the spikes, wired a diode into the plus side of the solenoid... will check the diode  tomorrow at the airport.
Terrence
L235/320 N211AL
 
----- Original Message -----
From: genemartin
Sent: Tuesday, April 14, 2009 20:06
Subject: [LML] spike suppresion diodes

Does anyone have a part# for the Diodes. I was going to place a order with Mouser but am overwhelmed by the 20 some pages of diodes.
 Terrence you posted you saved a schematic from Scott K. could you or Scott post that again, I remember seeing it and thought I saved it but can't find it .
Gene Martin
LNC2/320
 
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