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NAV Troubleshooting

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jpiavis(at)microsoft.com
Guest

Posted: Sat Jun 21, 2008 4:20 pm Post subject: NAV Troubleshooting

I’ve recently started flying my RV-7 with a Garmin 480/ SL-30. NAV antenna is an Archer antenna in the right tip. Strobe/ nav light cables are run per Archer instructions along leading edge of the antenna. COM works great on both radios, but I’m getting nothing for NAV and need to troubleshoot the problem. The single coax hits a splitter, which feeds the 480 and SL-30.   

   

What’s the best method for troubleshooting?  

   

Thanks,  



 Jim  

RV-7  

Redmond, WA  

      [quote][b]

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Bruce(at)glasair.org
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Posted: Sat Jun 21, 2008 4:40 pm Post subject: NAV Troubleshooting

If both nav  radios are down, I'd suspect the splitter. 

  

  

  

Bruce 

www.Glasair.org 

 

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rjquillin

Joined: 13 May 2007
Posts: 123
Location: KSEE

Posted: Sat Jun 21, 2008 4:50 pm Post subject: NAV Troubleshooting

At 17:16 6/21/2008, you wrote:

 	  Quote: 	
		  I've recently started flying my RV-7 with a Garmin 480/ SL-30. NAV 

antenna is an Archer antenna in the right tip. Strobe/ nav light 

cables are run per Archer instructions along leading edge of the 

antenna. COM works great on both radios, but I'm getting nothing for 

NAV and need to troubleshoot the problem. The single coax hits a 

splitter, which feeds the 480 and SL-30.


	


Both the 480 and SL30 use separate antennas for COM and NAV.

Two COM antennae, correct?

You say you're splitting an antenna.  Just the NAV, right?

Is NAV bad on both the 480 and the 30?

How is GS?



Ron Q.

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jpiavis(at)microsoft.com
Guest

Posted: Sat Jun 21, 2008 6:12 pm Post subject: NAV Troubleshooting

Yes, separate COM antennas for both radios, and only the one NAV, and NAV is bad on both. I can’t get an identifier on either so I haven’t checked GS either.   

   

I’m suspecting a bad BNC connector somewhere between the splitter and the antenna.   

   

           

Subject:         

             

Re: NAV Troubleshooting             

From:         

             

Ron Quillin (rjquillin(at)gmail.com ([email]rjquillin(at)gmail.com?subject=Re:%20NAV%20Troubleshooting&replyto=485da129.16538c0a.32f4.fffff42b(at)mx.google.com[/email]))             

Date:         

             

Sat Jun 21 - 5:50 PM         	  Quote: 	
		  At 17:16 6/21/2008, you wrote:>I've recently started flying my RV-7 with a Garmin 480/ SL-30. NAV >antenna is an Archer antenna in the right tip. Strobe/ nav light >cables are run per Archer instructions along leading edge of the >antenna. COM works great on both radios, but I'm getting nothing for >NAV and need to troubleshoot the problem. The single coax hits a >splitter, which feeds the 480 and SL-30. Both the 480 and SL30 use separate antennas for COM and NAV.Two COM antennae, correct?>I've recently started flying my RV-7 with a Garmin 480/ SL-30. NAV 	
0 	  Quote: 	
		  >I've recently started flying my RV-7 with a Garmin 480/ SL-30. NAV 	
1 	  Quote: 	
		  >I've recently started flying my RV-7 with a Garmin 480/ SL-30. NAV 	
2 	  Quote: 	
		  >I've recently started flying my RV-7 with a Garmin 480/ SL-30. NAV 	
3 	  Quote: 	
		  >I've recently started flying my RV-7 with a Garmin 480/ SL-30. NAV 	
4  

   

      [quote][b]

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rjquillin

Joined: 13 May 2007
Posts: 123
Location: KSEE

Posted: Sat Jun 21, 2008 8:17 pm Post subject: NAV Troubleshooting

At 19:05 6/21/2008, you wrote:



 	  Quote: 	
		  Yes, separate COM antennas for both radios, and only the one NAV, 

and NAV is bad on both. I can't get an identifier on either so I 

haven't checked GS either.



  I'm suspecting a bad BNC connector somewhere between the splitter 

 and the antenna.


	


I'd agree it's something between the splitter and the 

antenna.  Connectors always a good place to start. Splitters; being 

the passive devices they are, not much to fail except perhaps the 

input connector.



Don't forget both the 480 and 30 again split the NAV signal 

internally for VOR-LOC/GS, so a good signal to them is important.



Ron Q.

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wgill10(at)comcast.net
Guest

Posted: Sun Jun 22, 2008 5:05 am Post subject: NAV Troubleshooting

Hello Jim,  

   

If the navaid is on the field where you’re based, you could use an antenna from a portable com radio and connect it to the nav coax from each radio BEFORE the splitter to confirm operation of each radio. Then, work downstream if that worked.   

   

Bill  

RV-7 N151WP  

Lee’s Summit, MO  

   

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