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MB antenna length

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armywrights(at)adelphia.n
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Posted: Fri May 19, 2006 7:17 pm Post subject: MB antenna length

Where is the source for a 40" MB coax antenna?  All I find in the Connection

is a 75" length for a quarter wave balun.



 



Rob Wright

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brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Sat May 20, 2006 7:09 am Post subject: MB antenna length

On May 19, 2006, at 8:10 PM, Robert G. Wright wrote:



 	  Quote: 	
		   

 <armywrights(at)adelphia.net>



 Where is the source for a 40" MB coax antenna?  All I find in the  

 Connection

 is a 75" length for a quarter wave balun.


	


Antennas don't necessarily need to be resonant and/or efficient. If  

you have a lot of signal you might not need a lot of antenna.  

Consider that a marker beacon transmitter may run 50W of power or so  

into a directional antenna beaming it straight up at your airplane.  

Now consider that you need to receive it from only a couple thousand  

feet away at most. It doesn't take a lot of antenna at the receiver  

to pick up that signal.



Frankly, just about any piece of wire will suffice as a marker beacon  

antenna.



So, take a piece of coax, strip the shield off of about 40" of it  

(length is not critical) and connect the other end to your MB  

receiver. Put the unshielded 40" or so where it might be able to see  

the ground without to much shielding from the airframe. There is your  

MB antenna.

Brian Lloyd                         361 Catterline Way

brian-yak AT lloyd DOT com          Folsom, CA 95630

+1.916.367.2131 (voice)             +1.270.912.0788 (fax)



I fly because it releases my mind from the tyranny of petty things . . .

 Antoine de Saint-Exupry

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_________________
Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)

I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery

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