[Antennas] Identifying a 2m Yagi

Sat Oct 3 18:39:37 EDT 2009

----- Original Message ----- 
From: "K1TTT" <K1TTT at ARRL.NET>
> Most likely the coax is 1/2 wave. That is common for a T match, it provides
> the phase reversal between the two halves of the T.

 Yeah, I don't know why I was thinking 1/4 wave. Duh. Half-wave sounds
more likely.

> Take a look at this and see if it looks similar:
> http://www.m2inc.com/products/vhf/2m/2m12.html

 Pretty close. Not quite it, but close. All PL-259, all 3 on the same side,
all on the reflector side, no box enclosure. But the gap between the driven and
first director looks about the same - tiny, about 6". 
 Ray, KB0STN
> > I picked up a 2m yagi at a swap fest today. This one is the model,
> > mfgr. unknown to me, that has 3 coax connectors on the driven
> > element. I know that the center one is the main feed, and that there's
> > a jumper between the other two. I just needed to know what length
> > and impedance it is. I presume it's a 1/4 wave at RG-8, but I need
> > to make sure in order to test it out.
> > 
> > One other interesting thing about this is the type of match it has
> > on the driven element. If you've seen it, you know what I'm trying
> > to describe. There's 2 elements about an inch apart, joined near
> > the center of each other, and one element is 17" long while the
> > other is 19" long.
> > 
> > Who made it? :-)
> > 
> > Thanks!
> > 
> > 
> > Ray, KB0STN
> > 