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rleffler
Joined: 05 Nov 2006
Posts: 680
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 Posted: Mon Apr 07, 2014 9:03 am Post subject: Garmin Touch screen |
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Thanks for the update. I hope I'm past those. Just got all the current software updates last month.
Sent from my iPhone
On Apr 7, 2014, at 10:15 AM, "Carl Froehlich" <carl.froehlich(at)verizon.net (carl.froehlich(at)verizon.net)> wrote:
<![endif]--> <![endif]-->
My GTN-650 problems:
#1: Configuration module not provided (long story). I would not expect others to have this problem.
#2: This comm software fix. This is/was a known problem with the GTN series: http://garmin.blogs.com/files/1123.pdf Perhaps this is now fixed in production - don't know. I was an early buyer.
#3: The 650 went dark from time to time, then restarted itself a few seconds later. Unit sent back to Garmin for repair. Has worked since.
There is another known problem with the GTN-650 regarding interference between the communications section and the GPS receiver. Here is a note I got from the avionics shop on this problem:
One other thing I have seen. Transmitting with the comm causes a weird loop effect in the ELT antenna/coax and this knocks out the GPS. Try disconnecting the ELT coax and see if that solves it.
So in other words, doing a GPS approach and transmitting on the GTN-650 radio caused the GPS signals to drop out and you get the “abort approach” message. In my install I also noted a significant degrade in NAV signal when transmitting on the 650.
For my install the ELT had nothing to do with the problem. I did find the problem gone when I replace the installed MicroAir transceiver (comm #2) with the Dynon radio (the MicroAir was my temporary comm #2 while waiting for the Dynon radio to come out). After this change the GPS and NAV signal degrade was gone. I note the GTN-650 GPS and Nav signals were not degraded when transmitting on the MicroAir. So the MicroAir in receive mode somehow feed back into the GTN-650 GPS and NAV receivers when the 650 transmitted, even though the MicroAir was not transmitting.
So for the good news. Now after all the issues are resolved the GTN-650 works as advertised. The only lingering issue is the overpriced annual data base subscription.
Carl
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Bob Leffler
N410BL - Phase I
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stein(at)steinair.com
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| Posted: Mon Apr 07, 2014 9:08 am Post subject: Garmin Touch screen |
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..unless that other device is also a certified box. Most of them (the
GNS's and GTN's) will allow cross fill from other certified boxes, just not
any of the experimental EFISes that I'm aware of.
Cheers,
Stein
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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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| Posted: Mon Apr 07, 2014 9:43 am Post subject: Re: Garmin Touch screen |
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I"m not sure it's a case of "other certified boxes" or "other Garmin boxes". Recall a few years ago someone was marketing a box with speech recogniton - you could just talk into it and it would push a flight plan into the 4xxW box, thru the cross-fill port. It even had victor airways. Garmin issued a new software update for 4xxW which changed the software protocol on the cross-fill, effectively putting them out of business, and anyone who bought one had a useless piece of hardware.
EDIT: Stein tells me that the company was able to reverse engineer the new protocols, and they are now back in business.
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Bob Turner
RV-10 QB
Last edited by Bob Turner on Mon Apr 07, 2014 11:50 am; edited 1 time in total |
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deej(at)deej.net
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| Posted: Mon Apr 07, 2014 10:07 am Post subject: Garmin Touch screen |
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On 4/7/2014 9:29 AM, Gary Bennett wrote:
| Quote: | The other issue is panel space. Yes, you can buy a cheap COM only and a
separate VAL AVIONICS NAV, but now there are 2 boxes to find holes for. I
would much prefer a single NAV/COM unit.
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The VAL units are one inch in height, so you can install a Val COM and a
Val NAV in a single hole approximately the same space as a single
NAV/COM such as KX-155, etc, and slightly larger (about 0.4 inch) hole
than a GNC255. They also link together and talk the same protocol as
the SL30 to allow remote channel changing, etc, which I believe all of
the major EFIS units support.
Total cost of the Val COM + NAV is about $2150, which is slightly more
than half that of an SL30 or GNC255A for similar functionality.
I am not trying to argue, just am pointing out that there is at least
one alternative to Garmin in this area. The Val NAV is relatively new
to the market so it will be interesting to see how well it does.
-Dj
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Dj Merrill - N1JOV - VP EAA Chapter 87
Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/
Glastar Flyer N866RH - http://deej.net/glastar/
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