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10-23-2007, 11:20 AM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Amplified or not?
Quote:
Originally Posted by rv7boy
Thanks for the reply, Gil. I'm not using the attached antenna but rather the one that has the length of cable for mounting on the glareshield. I have it velcroed in place.
I notice the GA-56 lists for $385 but is available for $100 on ebay. I'm still interested in using what Garmin supplied with my GPS.
Don
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Don,
Is it an amplified antenna? ... or just a remote mount for the standard, non-amplified one?
BTW.. the GA-56 antennae are now $35 (shipping included) via VAF... 
http://www.vansairforce.com/communit...ad.php?t=22739
gil A - more dB gain is better....
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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10-23-2007, 11:27 AM
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Forum Peruser
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Join Date: Jan 2005
Location: Austinville, Alabama
Posts: 2,455
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Another possible solution...
I got a private email from a 396 user who said the only time he had a problem was when he was using the little antenna on the cord (that's the same one I use) and that was when it was located close to the GPS-18 "hockey puck" receiver/antenna. Also, certain known RF sources like antenna farms aggravated the problem.
Just continuing the thread, hoping this has an easy solution...
Don
__________________
Don Hull
RV-7 Wings
KDCU Pryor Field
Pilots'n Paws Pilot
N79599/ADS-B In and Out...and I like it! 
?Certainly, travel is more than the seeing of sights;
it is a change that goes on, deep and permanent, in the ideas of living." Miriam Beard
Last edited by rv7boy : 10-23-2007 at 11:56 AM.
Reason: Corrected "hockey puck XM antenna" to "GPS-18 hockey puck receiver/antenna."
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10-23-2007, 11:32 AM
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Forum Peruser
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Join Date: Jan 2005
Location: Austinville, Alabama
Posts: 2,455
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Quote:
Originally Posted by az_gila
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It's not a remote mount for the standard antenna, but whether or not it's amplified...I don't know.
Thanks for the info on the antenna. Looks like a good deal.
Don
__________________
Don Hull
RV-7 Wings
KDCU Pryor Field
Pilots'n Paws Pilot
N79599/ADS-B In and Out...and I like it!
?Certainly, travel is more than the seeing of sights;
it is a change that goes on, deep and permanent, in the ideas of living." Miriam Beard
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10-23-2007, 12:47 PM
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been here awhile
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Join Date: Dec 2004
Location: North Alabama
Posts: 4,300
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Quote:
Originally Posted by jsherblon
Hmmm... My wife and I were on vacation week before last, driving on the interstate between Mobile and Montgomery, Alabama. My PDA based road nav system dropped out several times. The drops were around 10 minutes at freeway speeds. I noticed the satellite reception signal LED on the receiver was not showing a singnal.
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No problem with your GPS.....that stretch of I-65 is so far out in the sticks that CD players won't work...... 
Time seems to stand still on that part of the drive to Mobile to see the kid....
I can't comment on the Garmin units, but my Lowrance Airmap 1000 with glare shield-mounted antenna has been solid with no reception problems.
Last edited by Sam Buchanan : 10-23-2007 at 04:02 PM.
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10-23-2007, 01:15 PM
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Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
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496 problems too
Last Saturday at 11:00 a.m. we flew 20 minutes to an airshow and my 496 with the remote antenna absolutely refused to acquire satellites. After it sat in the warm sun for 5 hours it acquired them in minutes. This is the third time in three months it has done this. I dunno...I've taken the battery out for a couple of minutes, turned it off and waited then turned it back on????????
__________________
Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
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10-23-2007, 05:13 PM
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Join Date: Dec 2006
Location: Kalifornia
Posts: 466
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From Garmin
I have the same drop out on my 396 every once in awhile on long trips. Their response:
Thank you for contacting Garmin International, The GA 26 antenna tends to be very reliable. At this point, I would start with troubleshooting software/almanac issues that could be causingthis. If you think it might be the antenna, re-install the stub antennaand use the procedures listed below to correct any software/almanac issues. The first resets the satellite almanac data, the next resets the entire unit (erasing all user data), and the last re-installs the operating system from our website. Try each one to see if it resolves the issue. ********************Satellite Reset - With the unit off, press and hold the Zoom OUT button while turning the unit on. This will reset the satellite data. ********************(Before doing any of the procedures listed below, you may want to backupyour user data - waypoints, routes, tracks - as it is usually erased during the following procedures. This is easily done if you have one ofour computer Mapsource software products. It can then be reloaded later.) Master Reset - With the unit off and all cables disconnected and any datacard removed, press and hold the OUT+QUIT+NRST buttons. Tap the POWER button once for about .5 - 1 second. (The unit will beep and power up to a shaded screen.) Continue holding the OUT+QUIT+NRST buttons for about 6 - 8 seconds and then release. If the unit powers off or refuses to power up to full brightness, remove and re-install thebattery and perform this reset procedure only one more time. Again remove and re-install the battery. The unit should now function properly. After this is done, enable the WAAS function and take it outside to let it acquire the satellite signals for about 10 minutes. ********************Unit Software Update - To do the Unit Software update, remove any datacard (if installed) and follow the steps below. Make sure to read all warnings as this update may erase all routes, waypoints, and tracks in the unit. 1. Go to our website at http://www.garmin.com/support/agree.jsp?id=921.2. Follow this link through the download process. 3. Save the file in a location on your computer that can be easily found- I suggest the Desktop.4. Find the downloaded file on your computer and run it (double click). 5. Select USB if that is how the GPS is connected to the computer.6. Make sure the GPS is turned on - simulator on. This update may take a minute to complete. After this is done, enable the WAAS function and take it outside to let it acquire the satellite signals for about 10 minutes.
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10-23-2007, 06:04 PM
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Join Date: Jun 2005
Location: Chino, CA
Posts: 738
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Cell phone interference
I was having the same issues with my 496 using the Garmin issued remote antenna. It seemed to happen to me when I was near Mt Wilson in SoCal which is an antenna farm for all the local TV guys. But it happened again in the middle of the San Joaquin Valley as well. I would switch to the little
antenna attached to the 496 and everything returned to normal. This happened on at least 4 occasions. I installed the latest software update (ver 3.30) and I made sure my (AT&T) cell phone is off, no more issues.
Which one fixed my problem? Don't know.
__________________
Tom Prokop
Chino, CA
RV-8A,180/CS/Carb, AFS 4500 EFIS/EMS
RV-6, sold, 820 hrs of fun.
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10-23-2007, 06:29 PM
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Join Date: Jul 2005
Location: Detroit, MI
Posts: 1,587
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Possible Fix
This is from a friend with a Mooney and a 396:
"...the first several thousand 396's had defective antennas. I paid 100 because I didnt want to wait, but if they google the 396, they will find the info reqd to get a new one free from garmin. since i put in my new antenna, i have never lost sat recept."
__________________
H. Evan's RV-7A N17HH 240+ hours
"We can lift ourselves out of ignorance, we can find ourselves as creatures of excellence and intelligence and skill. We can be free! We can learn to fly!" -J.L. Seagull
Paid $25.00 "dues" net of PayPal cost for 2015, 2016, 2017 and 2018 (December).
This airplane is for sale: see website. my website
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10-23-2007, 08:58 PM
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Join Date: Dec 2006
Location: Kalifornia
Posts: 466
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Defective Antenna
I too had the earlier antenna. But with the replacement the 396 dropped signal 3 times on a recent trip to the midwest from CA after months of perfect service. Tonight it dropped signal then couldn't find the sattelites for 20 minutes. I'll be trying their reset information posted earlier. Will post results if it's useful to you all.
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10-23-2007, 10:04 PM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Voice of America?
Quote:
Originally Posted by Chino Tom
I was having the same issues with my 496 using the Garmin issued remote antenna. It seemed to happen to me when I was near Mt Wilson in SoCal which is an antenna farm for all the local TV guys. But it happened again in the middle of the San Joaquin Valley as well. I would switch to the little
antenna attached to the 496 and everything returned to normal. This happened on at least 4 occasions. I installed the latest software update (ver 3.30) and I made sure my (AT&T) cell phone is off, no more issues.
Which one fixed my problem? Don't know.
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Tom... if you lost signal in the Central Valley near Delano, you can blame the VOA SW transmitter station there... lots of RF energy radiating around...
My sailplane electronic variometer wouldn't work in the area, the only place that has happened...
But the problem will go away the end of this month....
http://www.rwonline.com/pages/s.0100/t.7486.html
gil A
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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