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stray RF

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jbr79r(at)yahoo.com
Guest

Posted: Mon Jul 05, 2010 8:25 pm Post subject: stray RF

Hi Bob

I have recently developed a problem when I transmit my VSI and other features on my Cheltons goes crazy.  I have added a engine monitor EI MVP-50 recently.  Is there a way to isolate the cause.  This is a recent occurance  No prior problem for 350  hrs

 

James Robinson

Glasair lll  N79R

Spanish Fork UT  U77





 



 [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Tue Jul 06, 2010 8:43 am Post subject: stray RF

At 11:18 PM 7/5/2010, you wrote:

 	  Quote: 	
		  Hi Bob

I have recently developed a problem when I transmit my VSI and other 

features on my Cheltons goes crazy.  I have added a engine monitor 

EI MVP-50 recently.  Is there a way to isolate the cause.  This is a 

recent occurance  No prior problem for 350  hrs


	


   A high-probability possibility is that a feed line

   shield has become detached at one end or the other

   on your comm antenna. A simple inspection may suffice.

   An organized troubleshooting effort suggest you

   dummy load the transceiver at the back of the tray

   with a device like this:



http://aeroelectric.com/Pictures/Tools/RF_Antenna_Test_Tools/DummyLoad.jpg



   See if the problem goes away. If so, then

   move the dummy load to the other end of the

   feedline. You'll need a male-male adapter, a

   t-connector can be used too. Try again to see

   if the problem goes away or is still there.



   If the problem does not manifest with either

   dummy load experiment, then it's likely that

   something has changed in system conditions

   for the Cheltons. But I'm betting it's a feed

   line problem.

   Bob . . .

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jbr79r(at)yahoo.com
Guest

Posted: Tue Jul 06, 2010 9:28 am Post subject: stray RF

Thanks Bob!!!!

 

James Robinson

Glasair lll  N79R

Spanish Fork UT  U77

From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com>

To: aeroelectric-list(at)matronics.com

Sent: Tue, July 6, 2010 10:45:17 AM

Subject: Re: stray RF



 --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>



At 11:18 PM 7/5/2010, you wrote:

 	  Quote: 	
		   Hi Bob

 I have recently developed a problem when I transmit my VSI and other features on my Cheltons goes crazy.  I have added a engine monitor EI MVP-50 recently.  Is there a way to isolate the cause.  This is a recent occurance  No prior problem for 350  hrs


	


  A high-probability possibility is that a feed line

  shield has become detached at one end or the other

  on your comm antenna. A simple inspection may suffice.

  An organized troubleshooting effort suggest you

  dummy load the transceiver at the back of the tray

  with a device like this:

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

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