Yagi antenna feedpoint

[scottymcneill8657]

Working on building a 8 element yagi for 2 metre fm work. I have elements mounted to the boom and the boom assembled but I am having difficulty understanding how to install the feedpoint. From what I understand, I need to make a gamma match connected to the driven element but nothing I can find online makes a whole lot of sense to me. This is my first attempt so any help would be welcome

 

[jeepinjeepin]

Wow, go big or go home, huh? Maybe start out by building a 3 element directly from one of the sets of plans online and then graduate up to the 8 element design after you have built and understand a few forms of matching assemblies?

 

[scottymcneill8657]

The elements and boom were easy- the gamma match is what confuses me. Is there any other way other than a gamma match? I'm trying to hit a repeater 219km away- I can just barely hear them now and they can't hear me at all.

 

[jeepinjeepin]

I think the other matching method for a yagi is called "pi match". There may be other ways as well. I wasn't trying to be condescending at all on your building skill. I was just assuming that the gamma match would be more straightforward if building directly from known measurements. I have no grounds to judge as I have not even starting building a yagi despite all of the plans I have been looking over.

 

[nanZor]

Perhaps using a simpler method by making the driven element a folded dipole to transform the low impedance of a yagi would help:

The OWL Folded Dipole

This might just do the trick, and the link is to an actual multi-element beam.