X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 27 Aug 2009 22:32:22 -0400 Message-ID: X-Original-Return-Path: Received: from QMTA06.westchester.pa.mail.comcast.net ([76.96.62.56] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3827005 for lml@lancaironline.net; Thu, 27 Aug 2009 19:27:14 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.62.56; envelope-from=n4zq@comcast.net Received: from OMTA01.westchester.pa.mail.comcast.net ([76.96.62.11]) by QMTA06.westchester.pa.mail.comcast.net with comcast id ZbJ81c0020EZKEL56bSd2D; Thu, 27 Aug 2009 23:26:37 +0000 Received: from [192.168.0.3] ([24.34.152.36]) by OMTA01.westchester.pa.mail.comcast.net with comcast id ZbSe1c00L0nNMfc3MbSfUA; Thu, 27 Aug 2009 23:26:39 +0000 X-Original-Cc: List Lancair Mailing X-Original-Message-Id: From: "Angier M. Ames" X-Original-To: Robert Pastusek In-Reply-To: <084b01ca2725$cc4be6c0$64e3b440$@com> Content-Type: multipart/alternative; boundary=Apple-Mail-1-377974292 Mime-Version: 1.0 (Apple Message framework v936) Subject: Re: AOA Pro X-Original-Date: Thu, 27 Aug 2009 19:26:37 -0400 References: <084b01ca2725$cc4be6c0$64e3b440$@com> X-Mailer: Apple Mail (2.936) --Apple-Mail-1-377974292 Content-Type: text/plain; charset=WINDOWS-1252; format=flowed; delsp=yes Content-Transfer-Encoding: quoted-printable Hi Bob, The problem/confusion I encountered was with Advanced Flight Systems =20 technical support. They seemed not to understand that according to my =20= install manual(they did not have a copy that old!) dated January 1999, =20= AOA Pro CPUs with serial #s above 200 have internal diodes to protect =20= both the gear and flap circuits. They kept insisting that the AOA gear =20= circuit could not SHARE a switch with any other system. My CPU went =20 back to them this week for both hardware and software upgrades which =20 are free. I asked them to check that my unit #298 had the proper =20 diodes installed and they confirmed that it did. So I can connect the AOA gear circuit to the ground lug of one of the =20= gear micro switches and proceed onward and hopefully upward... I can't imagine that there are Lancair builders(still building) out =20 there who have an AOA unit with a serial # less than 200. If they do, an external diode would be required. Angier N4ZQ On Aug 27, 2009, at 10:50 AM, Robert Pastusek wrote: > Angier, > I agree with this solution, but if you use it, be sure to put an =20 > isolation diode in the ground wire for each circuit (gear light and =20= > AOA sensor) before it=92s connected to the gear down switch. =20 > Alternatively, consider installing a second identical switch =93on top = =20 > of=94 the existing switch. Just need some longer #4 bolts. I used this = =20 > solution to operate my A/C cooling fans because I didn=92t want any =20= > other wiring tied to the gear down circuit. This is probably a false =20= > concern, but in any case, either method should work well. > > Bob > > From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf =20= > Of Sky2high@aol.com > Sent: Tuesday, August 25, 2009 11:58 PM > To: lml@lancaironline.net > Subject: [LML] Re: AOA Pro > > Yep, Marv is right.............. > > Grayhawk > Gear down 99 and 44/100ths percent of the time. > > In a message dated 8/25/2009 8:49:56 P.M. Central Daylight Time, = marv@lancair.net=20 > writes: > Posted for "Angier M. Ames" : > > Just wondering how builders are grounding pin 9 on the 25 pin Dsub =20= > connector > for a gear down indication on the display. > For example, does anyone know of a double pole version of our =20 > traditional > gear switch? > > Angier Ames > N4ZQ > > [Seems to me the switches that give you your three greens are =20 > already sending grounds for those lights. Assumiing your gear =20 > lights operate similarly you could pick up any one of those grounds =20= > to trigger your AOA gear down indicator. Check your wirebook. =20 > ] > > -- > > For archives and unsub = http://mail.lancaironline.net:81/lists/lml/List.html > --Apple-Mail-1-377974292 Content-Type: text/html; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Hi Bob,
The = problem/confusion I encountered was with Advanced Flight Systems = technical support. They seemed not to understand that according to my = install manual(they did not have a copy that old!) dated January 1999, = AOA Pro CPUs with serial #s above 200 have internal diodes to protect = both the gear and flap circuits. They kept insisting that the AOA gear = circuit could not SHARE a switch with any other system. My CPU went = back to them this week for both hardware and software upgrades which are = free. I asked them to check that my unit #298 had the proper diodes = installed and they confirmed that it did.
So I can connect the = AOA gear circuit to the ground lug of one of the gear micro switches and = proceed onward and hopefully upward...

I can't = imagine that there are Lancair builders(still building) out there who = have an AOA unit with a serial # less than 200.
If they do, an = external diode would be = required.

Angier
N4ZQ


On Aug 27, 2009, at 10:50 AM, Robert = Pastusek wrote:

Angier,
I agree with this solution, = but if you use it, be sure to put an isolation diode in the ground wire = for each circuit (gear light and AOA sensor) before it=92s connected to = the gear down switch. Alternatively, consider installing a second = identical switch =93on top of=94 the existing switch. Just need some = longer #4 bolts. I used this solution to operate my A/C  cooling = fans because I didn=92t want any other wiring tied to the gear down = circuit. This is probably a false concern, but in any case, either = method should work = well.
 
Bob
 
= From: Lancair Mailing List [mailto:lml@lancaironline.net]&nb= sp;On Behalf Of Sky2high@aol.com
Sent: Tuesda= y, August 25, 2009 11:58 PM
To: lml@lancaironline.net
Subject= : [LML] Re: AOA = Pro
 
Yep, Marv is = right..............
 
Grayh= awk
Gear down 99 and 44/100ths percent of the = time.
 
In a message = dated 8/25/2009 8:49:56 P.M. Central Daylight Time, marv@lancair.net writes:

Posted for = "Angier M. Ames" <n4zq@comcast.net>:

 Ju= st wondering how builders are grounding pin 9 on the 25 pin = Dsub  connector 
for a gear down indication on the = display.
For example, does anyone know of a double pole version of = our  traditional 
gear = switch?
 
 Angier Ames
 N4ZQ

[Seems to me = the switches that give you your three greens are already sending grounds = for those lights.  Assumiing your gear lights operate similarly you = could pick up any one of those grounds to trigger your AOA gear down = indicator.  Check your wirebook.   = <Marv>    = ]

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