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Narco ADF with RG-62 Antenna

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mprather(at)spro.net
Guest

Posted: Sun Jan 07, 2007 5:52 pm Post subject: Narco ADF with RG-62 Antenna

Hey Listers,



My airplane has a Narco 141 ADF (which works only marginally).  I was

under the panel inspecting things and noticed that it's wired with RG-62

coax.  I didn't recognize that number so I looked it up.  I found that

it's 93ohm impedance cable.  Does anybody know if that's the right stuff

for this ADF?  I had thought 50ohm was the defacto standard for avionics. 

I am wondering if having the wrong cable might be causing the substandard

performance..



Other question..  Does anyone have a diagnostic manual or install manual

for this ADF?

Regards,



Matt-

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nuckollsr(at)cox.net
Guest

Posted: Sun Jan 07, 2007 6:35 pm Post subject: Narco ADF with RG-62 Antenna

At 06:49 PM 1/7/2007 -0700, you wrote:



 	  Quote: 	
		  



Hey Listers,



My airplane has a Narco 141 ADF (which works only marginally).  I was

under the panel inspecting things and noticed that it's wired with RG-62

coax.  I didn't recognize that number so I looked it up.  I found that

it's 93ohm impedance cable.  Does anybody know if that's the right stuff

for this ADF?  I had thought 50ohm was the defacto standard for avionics.

I am wondering if having the wrong cable might be causing the substandard

performance..



Other question..  Does anyone have a diagnostic manual or install manual

for this ADF?


	


    Yeah, that's the right stuff. It's a special lo-capacity

    coax used in low frequency radio receivers. Not easy to find

    and not fun to work with either as I recall but it's been

    many moons.



    The only data I have on it is the pinout diagrams I've published

    at:



http://www.aeroelectric.com/Installation_Data/Narco_140-141_ADF.pdf



    Bob . . .



      ---------------------------------------------------------

      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

      ---------------------------------------------------------

- 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:

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mprather(at)spro.net
Guest

Posted: Sun Jan 07, 2007 7:44 pm Post subject: Narco ADF with RG-62 Antenna

Okee doke..  The pinout is interesting, but doesn't have everything I was

looking for.



Thanks anyway (times two).

Matt-



 	  Quote: 	
		   

 <nuckollsr(at)cox.net>



 At 06:49 PM 1/7/2007 -0700, you wrote:



>

> <mprather(at)spro.net>

>

>Hey Listers,

>

>My airplane has a Narco 141 ADF (which works only marginally).  I was

>under the panel inspecting things and noticed that it's wired with RG-62

>coax.  I didn't recognize that number so I looked it up.  I found that

>it's 93ohm impedance cable.  Does anybody know if that's the right stuff

>for this ADF?  I had thought 50ohm was the defacto standard for avionics.

>I am wondering if having the wrong cable might be causing the substandard

>performance..

>

>Other question..  Does anyone have a diagnostic manual or install manual

>for this ADF?



     Yeah, that's the right stuff. It's a special lo-capacity

     coax used in low frequency radio receivers. Not easy to find

     and not fun to work with either as I recall but it's been

     many moons.



     The only data I have on it is the pinout diagrams I've published

     at:



 http://www.aeroelectric.com/Installation_Data/Narco_140-141_ADF.pdf



     Bob . . .



       ---------------------------------------------------------

       < What is so wonderful about scientific truth...is that >

       < the authority which determines whether there can be   >

       < debate or not does not reside in some fraternity of   >

       < scientists; nor is it divine. The authority rests     >

       < with experiment.                                      >

       <                            --Lawrence M. Krauss       >

       ---------------------------------------------------------

- 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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