X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 01 Dec 2011 13:05:07 -0500 Message-ID: X-Original-Return-Path: Received: from carbinge.com ([69.5.27.218] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with SMTP id 5264919 for lml@lancaironline.net; Wed, 30 Nov 2011 09:48:48 -0500 Received-SPF: none receiver=logan.com; client-ip=69.5.27.218; envelope-from=jbarrett@carbinge.com Received: (qmail 6174 invoked from network); 30 Nov 2011 14:48:13 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; h=X-Originating-IP:Reply-To:From:To:References:In-Reply-To:Subject:Date:Message-ID:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Mailer:Thread-Index:Content-Language; s=default; d=carbinge.com; b=V5XZjph5Wsjvou9VbWK9wf+AfCsdlQC1YpMiB3ort06FgtQWIR383jzsZzL+SyfhAOBorglde5vzkBGn0lB9w2ZA+cPjcl0iXsOI1QSHrVXY/Oewz7AUGqcYBhMD3pSNPKxgyZq6v5rY4J5TRzE8Pp7+MoEo79ADwp8hqTvAryY=; X-Originating-IP: [24.143.114.8] Reply-To: From: "John Barrett" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Re: cheltons losing gps signal X-Original-Date: Wed, 30 Nov 2011 06:48:13 -0800 X-Original-Message-ID: <00a401ccaf6f$17247e40$456d7ac0$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcyvbVnPHz/MZWzITfKuuDoK1ljRZQAAYkDA Content-Language: en-us The idea of trying a different antenna is one we have considered but they cost several hundred dollars - a bit much for just a test. If we could find one to borrow for half an hour, that would eliminate one possible cause. John barrett -----Original Message----- From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of David M. Powell CRFA Sent: Wednesday, November 30, 2011 6:36 AM To: lml@lancaironline.net Subject: [LML] Re: cheltons losing gps signal Could be just about anything. If you have re-positioned your GPS antennae, I'd move them back. I'd also check the connections on the antennae and see that they are snug and fitting properly and weren't pulled out of place when you were working on the nearby screen. If they are snug, I'd even go to the extent of trying a new antenna and mounting it high up (temporarily for testing) in the canopy to see if the problem disappears. By the way, GPS interference tests do occur. The East Coast has one planned. You may want to see if there is a GPS notam in your area (or was). https://www.faasafety.gov/files/notices/2011/Nov/CSFTL_11-06_GPS_Flight_Advi sory.pdf Good luck! David Powell CRFA superdmp@sonic.net (386) 868-5858 -----Original Message----- From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Dr. Weinsweig Sent: Wednesday, November 30, 2011 6:23 AM To: lml@lancaironline.net Subject: [LML] cheltons losing gps signal hi all, since installing an overdue software update to my cheltons as well as sending out 1 screen to be "overhauled" by cobham (both of which may be totally incidental), my cheltons lose gps signal intermittently usually about 10-15 minutes into the flight then about half an hour later regain the gps signal though there doesn't seem to be a lot of rhyme or reason behind when/where the signal is lost or reappears. the ahrs works fine and it tries to calculate where i am on the moving map but not accurately enough. i have tried calling cobham tech support but have been unable to get my calls returned which is unusual as in the past they have been responsive. any great ideas on where to troubleshoot or has anyone else had this issue before? is it the antennae/receiver? thanks, david weinsweig 304-633-5221 weinsweigd@gmail.com n750dw propjet still for sale with a lower price(asking 475k or will take a 5+place on partial trade) -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html -- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html