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  #1  
Old 03-27-2016, 01:47 AM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
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Default Can't receive AWOS with SL40

I have a Garmin SL40 and can’t receive AWOS stations. I understand the SL40 can receive frequencies with three decimal places (e.g. 126.825) by inputting the frequency with only first two decimal places (e.g. 126.82) . The SL40 apparently interprets the third decimal on its own. I have tried to receive several AWOS stations with no luck. Anybody have any idea what I might be doing wrong?
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Last edited by Piper J3 : 03-27-2016 at 01:54 AM.
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  #2  
Old 03-27-2016, 05:54 AM
Jimd Jimd is offline
 
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Default

I don't have on of those, but I wonder if you can configure the channel spacing? Try looking on the garmin site for the install and pilot guide. Maybe the spacing is to wide or narrow and is not tuning the third digit the way you need it to?

Jim
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  #3  
Old 03-27-2016, 06:44 AM
JBPILOT JBPILOT is offline
 
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Default All early RV-12's have an SL-40 - - -

and mine works very good. You will likely have to go thru the settings. Have you changed any of the settings ?
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  #4  
Old 03-27-2016, 07:29 AM
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Piper J3 Piper J3 is offline
 
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Default

I have studied both the User and Install manuals for the SL40 and I see where System Functions can be user adjusted. In fact, I have previously adjusted the sidetone level so I?m familiar with how to make changes to the setup. However, looking at the list of possible user adjustments I don?t see anything pertaining to XXX.xxx or XXX.xx frequency selection.

I have initiated a request for assistance with Garmin and now await their response. I?ll post result here when I get resolution to the problem.
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Jim Stricker
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PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 622

LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father & CFI) - USAAF 1st Lt. Captain B-17H
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  #5  
Old 03-27-2016, 07:40 AM
gmkonrad gmkonrad is offline
 
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Default SL40 Comm

From the SL40 manual:

2. Turn the Small, inner knob to change the values in 25 kHz increments. The kHz selection range is
between 000 and 975 kHz in 25 kHz steps. Note that only two digits are displayed to the right of the
decimal point.
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  #6  
Old 03-27-2016, 08:06 AM
JBPILOT JBPILOT is offline
 
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Default From my old notes :

SW VER 2.2
Hdphon 000
Mic 1 Sqlch 058
Mic 2 Sqlch 058
Tranmit Mic 1 & 2
Intcom Lvl 249
Sidton Lvl 040
Lo Dsp Lvl 00
Hi Dsp Lvl 50

I think this is where mine are yet.
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  #7  
Old 03-27-2016, 11:50 AM
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Piper J3 Piper J3 is offline
 
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Update... Went flying this morning (Easter - wife said OK) and I tried six different AWOS stations and was ready to give up. I tried one more and it works. Is it common for so many AWOS to be off-line? All stations were very easily within range. Glad its working. Love the airplane and love the electronics...
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Jim Stricker
EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 622

LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father & CFI) - USAAF 1st Lt. Captain B-17H
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  #8  
Old 03-27-2016, 12:06 PM
BigJohn BigJohn is offline
 
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Jim,

Does the radio work with other stations using the .025 increments? Try it with a handheld, look for a pattern. Hard to imagine why only AWOS will not work.

John
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  #9  
Old 03-27-2016, 12:45 PM
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rvbuilder2002 rvbuilder2002 is offline
 
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Have you tried disabling the squelch while the channel is tune?
Some AWOS xmitters are weak, or the auto squelch level might be turned too high.
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  #10  
Old 03-27-2016, 12:56 PM
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RV6_flyer RV6_flyer is offline
 
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Default

Quote:
Originally Posted by BigJohn View Post
Jim,

Does the radio work with other stations using the .025 increments? Try it with a handheld, look for a pattern. Hard to imagine why only AWOS will not work.

John
Quote:
Originally Posted by rvbuilder2002 View Post
Have you tried disabling the squelch while the channel is tune?
Some AWOS xmitters are weak, or the auto squelch level might be turned too high.
Yes I would try to find a pattern using another radio. Some can be picked up at a fair distance others cannot be heard unless you are right on top of them.

I have seen AWOS that were not working and some that are intermittent.

Any time that I cannot hear an AWOS or ATIS, I always attempt to disable the squelch.
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