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Marker beacon antenna for composite aircraft

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longg(at)pjm.com
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Posted: Thu Jun 14, 2007 12:27 pm Post subject: Marker beacon antenna for composite aircraft

Question, can anyone recommend a ground plane-less  marker beacon antenna option for use in composite  aircraft?

  

 Thanks

 



  [quote][b]

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recapen(at)earthlink.net
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Posted: Thu Jun 14, 2007 12:59 pm Post subject: Marker beacon antenna for composite aircraft

IIRC there is a copper foil version....I think I have one from Bob Archer.....memory test.



I think you can get it through spruce or B&C.....don't remember.....

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peter(at)sportingaero.com
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Posted: Thu Jun 14, 2007 1:47 pm Post subject: Marker beacon antenna for composite aircraft

I’m prepared to be shot down here by those who know more than me about antenna theory, but I have installed a 40” long piece of copper tape in a glassfibre wing tip for a beacon antenna & expect it to work. As beacons are reasonably powerful, and you (hope to) fly right over the top of them at short range, I believe a ground plane as such is not really required – perhaps the screen of the feeder wire acts as a very small ground plane to complete the virtual circuit?  

   

Peter  

   

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simon(at)synchronousdesig
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Posted: Thu Jun 14, 2007 1:50 pm Post subject: Marker beacon antenna for composite aircraft

Try the SA-009 from Bob Archer sold at Chief  Aircraft and other places for 65 buckarooskis:

  

       http://www.chiefaircraft.com/airsec/Aircraft/Antennas/ArcherSportcraft.html

  

 Simon  Ramirez, Aerocanard  Builder

 LEZ N-44LZ

 Oviedo, FL

 Copyright © 2007

 <?xml:namespace prefix  = o ns = "urn:schemas-microsoft-com:office:office" /> 

  



   From:  owner-aeroelectric-list-server(at)matronics.com  [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of  longg(at)pjm.com

Sent: Thursday, June 14, 2007 4:26 PM

To:  aeroelectric-list(at)matronics.com

Subject: Marker  beacon antenna for composite aircraft

 

 Question, can anyone recommend a ground plane-less  marker beacon antenna option for use in composite  aircraft?

  

 Thanks

   [quote][b]

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berkut13(at)berkut13.com
Guest

Posted: Thu Jun 14, 2007 1:51 pm Post subject: Marker beacon antenna for composite aircraft

Sure - a length of 12-gauge wire on the end of some coax  (I used RG-174).  Copper tape will work just as well.

  

 I forget the "tuned length" as I'm not at the hangar, but if  you are interested I can look that up for you.

  

 Works just fine for me.

 

James Redmon - Race 13

Berkut #013  N97TX

http://www.berkut13.com



  

  

 [quote]   ---

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nuckollsr(at)cox.net
Guest

Posted: Sun Jun 17, 2007 5:49 am Post subject: Marker beacon antenna for composite aircraft

At 09:28 PM 6/15/2007 -0400, you wrote:



 	  Quote: 	
		  



40" of 22AWG wire it shall be. Any special needs for attaching it to the

coax? Solder? Duct tape? Insulate? I will be coming back from under the

panel. Ok if I epoxy (tack) the wire to the body so it does not move?



Thanks for the tip


	


    Solder is recommended. You're laying against a non-conductive

    surface (assuming fiberglas . . . this won't work in a carbon

    structure) so no other insulation is needed. Tape or otherwise

    fasten the wire to the inside surface to keep it stretched out.

    Both ends and a couple of places along the length is sufficient.



    Bob . . .

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