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Marker Beacon Antenna

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Roger Bentlage

Joined: 27 Oct 2006
Posts: 6

Posted: Tue Jan 16, 2007 12:05 pm Post subject: Marker Beacon Antenna

An old topic but I could not find the information.

I plan to install the marker beacon antenna on the lower cowl of a RV-7 and

have a couple of questions:

1. Is the 40" length mandatory or will 32 to 36" work?

2. Can the antenna be made from coax with the outer braid and insulation

stripped leaving only the center wire and insulation as the antenna?

3. Can the antenna be installed along the upper edge of the lower cowl or

will the vertically oriented fiberglass (side of cowl) mask the signal?

4. Does the antenna have to be straight for its entire length or is a 90*

turn for the last 6" acceptable?

A lot of concern for a system that will be gone in a few years but it's

there so I might as well use it.

Thanks in advance,

Roger,

RV-7 Finishing

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frank.hinde(at)hp.com
Guest

Posted: Tue Jan 16, 2007 1:23 pm Post subject: Marker Beacon Antenna

I made mine 40" and curled the end round over the last 6"...It works

great. I stuck mine in the bottom....Unless you intend  to fly

approaches inverted I would do the same again..



Like you I stripped a length of Coax.



One piece of advice, make the connection where you can reach it thru the

oil door. I put mine on the other side, amazing how many times I've had

to remove the top cowl again after forgetting to hook up the antenna. 



Frank 7a...Doing my IFR training



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