[Antennas] Identifying a 2m Yagi

Sat Oct 3 15:23:18 EDT 2009

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.
Take a look at this and see if it looks similar:
http://www.m2inc.com/products/vhf/2m/2m12.html
David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net

> -----Original Message-----
> From: Ray Brown [mailto:kb0stn at sbcglobal.net]
> Sent: Saturday, October 03, 2009 18:47
> To: antennas at mailman.qth.net
> Subject: [Antennas] Identifying a 2m Yagi
>> 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
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