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Marker Beacon Diplexer Question

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dpharker(at)worldnet.att.
Guest

Posted: Tue Dec 18, 2007 9:49 am Post subject: Marker Beacon Diplexer Question

I plan to have one marker beacon antenna feed two marker beacon receivers.

Comant makes a diplexer CI-509 that does this and it costs about $110.



Anybody see a problem with using a plain old VHF splitter for a TV set to do

this? It costs about $5 bucks and covers the frequency range. 75 Mhz



Thanks



Don Harker

RV7A Finishing

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nuckolls.bob(at)cox.net
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Posted: Tue Dec 18, 2007 2:15 pm Post subject: Marker Beacon Diplexer Question

At 11:47 AM 12/18/2007 -0600, you wrote:



 	  Quote: 	
		  

<dpharker(at)worldnet.att.net>

I plan to have one marker beacon antenna feed two marker beacon receivers.

Comant makes a diplexer CI-509 that does this and it costs about $110.



Anybody see a problem with using a plain old VHF splitter for a TV set to do

this? It costs about $5 bucks and covers the frequency range. 75 Mhz


	


   Marker transmitters are exceedingly strong for

   the task . . . since you pass over them at or

   below 1000'



   A wet string will serve as an antenna on most

   receivers. What kind of airplane are you building

   and what kind of antenna have you installed. Also,

   if you have a perception of increased system reliability

   for having dual receivers, have you considered putting

   the waypoints into your GPS for the markers and using

   that as a back-up for the 75 Mhz receivers?



   Finally, the TV couple will probably work fine too.

   But carrying two MB receivers doubles the probability

   of having to have an MB receiver repaired while

   pressing a GPS receiver that's already in place into

   backing up an MB receiver is a reduction in complexity,

   weight, and cost of ownership.



   Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

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

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BobsV35B(at)aol.com
Guest

Posted: Tue Dec 18, 2007 6:10 pm Post subject: Marker Beacon Diplexer Question

Good Evening Don,

  

  I know this is rather late in the discussion, but do you really feel  you will need the marker beacons?

  

 Fan markers are being phased out. If you have any IFR approved GPS, there  is a good chance, though not a certainty, that you will be able to use a GPS  position instead of a fan marker for any required waypoint identification.   While I would certainly spend a few bucks getting the marker beacons operating,  it would not be high on my list of things that were needed.

  

 If you have not already purchased them, maybe you could eliminate some  weight and cost as well as free up some space that could be better used in  another manner.

  

 Just a thought!

  



 Happy  Skies,



Old Bob

AKA

Bob Siegfried

Ancient Aviator

Stearman  N3977A

Brookeridge Air Park LL22

Downers Grove, IL 60516

630  985-8503

   

  In a message dated 12/18/2007 11:51:45 A.M. Central Standard Time,  dpharker(at)worldnet.att.net writes:

  	  Quote: 	
		  -->    AeroElectric-List message posted by: "Donald Harker"    <dpharker(at)worldnet.att.net>

I plan to have one marker beacon    antenna feed two marker beacon receivers.

Comant makes a diplexer CI-509    that does this and it costs about $110.



Anybody see a problem with    using a plain old VHF splitter for a TV set to do

this? It costs about $5    bucks and covers the frequency range. 75 Mhz



Thanks



Don    Harker

	






See AOL's top rated recipes and easy ways to stay in shape for winter.

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