[Tbone]

I'm planning to install a RAMI AV12 on top of the vert. I am using this for VOR and G/S. It says in the installation paper that I must use their "integral balun transformer" which I don't have. Is this something that I can roll my own or best to buy direct?

 

[noelf]

The antenna should already contain the "hockey puck" ballun transformer. It is the connection screws that are not included.

 

[Ironflight]

Just remember that "cat whiskers" on the top of the vertical stab on a tailwheel RV are actually referred to as "eye pokers"...actually, quite dangerous in a dark hangar, or when distractedly talking with others and showing your plane at a fly-in....

 

[Tbone]

I do plan on pointing it forward to prevent the poking of the eyes!

 

[Tbone]

The antenna should already contain the "hockey puck" ballun transformer. It is the connection screws that are not included.

By their website the balun is part of the coax.

 

[Mike S]

I just went through this a year or two ago.

Info here. http://www.vansairforce.com/community/showthread.php?t=83246&highlight=balun

Made my own, BTW.

 

[BobTurner]

It's confusing if they used the word "integral", which usually means "built in".

BTW, there is an error in the old posts. 26" is a good number for a quarter wavelength at 112 MHz IN AIR. Signals in ideal coax travel at the speed of light, but in coax with real dielectrics it is slower - 0.7c is a good number for RG-58 and RG-400. So a quarter wave of that coax is about 18".

 

[Tbone]

So if I follow Nuckolls way just use 18" and should it be as close to antenna as possible or just inline someplace ?

 

[BobTurner]

As close as possible to the antenna.