[TowerTalk] Shorty 40

john at kk9a.com john at kk9a.com
Wed Oct 17 20:56:19 EDT 2007

There are different configurations of linear loading.  Some antennas split 
the element and the loading wire runs toward the center of the element 
acting as a truss and some split the element further toward the end and the 
loading wire goes toward the end of the element.  It would be nice to know 
what effect these configurations have on the pattern and what their real 
efficiencies are.

----- Original Message ----- 
From: "jeremy-ca" <km1h at jeremy.mv.com>
To: <john at kk9a.com>; <TOWERTALK at contesting.com>
Cc: <greg at k9ig.com>
Sent: Wednesday, October 17, 2007 22:51
Subject: Re: [TowerTalk] Shorty 40

I had a pair of 4 el KLMs and was never overly impressed by their
performance. Before that I had a Hi-Gain 2 el and it was often referred to
as a rotary dummy load.

One of my KLM's has been sold and Im contemplating converting the other into
a pair of 2 el with Cushcraft style loading coils.

I feel that nobody has got linear loading completely figured out.


> To: towertalk at contesting.com
> Subject: [TowerTalk] Shorty 40
> From: Greg Clark <putt_1 at yahoo.com>
> Reply-to: Greg Clark <greg at k9ig.com>
> Date: Wed, 17 Oct 2007 05:29:38 -0700 (PDT)
> List-post: <mailto:towertalk at contesting.com>
> Folks,
> I'm in the process of rebuilding my station and am in need of a 2 ele 40m
> yagi.
> In the past I had an old 40-2CD by Cushcraft on the tower.
> In shopping around I have looked at:
> XM240
> Force 12 (new and old linear loading designs)
> Hy-Gain
> M2
> The Optibeam looks nice but is out of my budget.
> -The XM240's are kinda hard to find - all on backorder at most of the
> major
> shops in the US as of the end of last week.  Not sure if this has anything
> to
> do with the company recently being purchased??
> -Force 12 has a 4-6 week lead time (even with that quote it's "iffy" as to
> when
> it will arrive).
> -M2 - I couldn't find a direct link on their site for a 2 ele version any
> longer, so I don't even know if they are still available as I have not
> called
> the factory yet.  Anyone know if they still make a 2 ele 40m yagi?
> -As for Hy-Gain - well - I just don't see many of these yagis - are they
> that
> poor of a performer?  We had one at the WM5G multi years ago - I don't
> remember
> much about it.  I can get one of these in a reasonable amount of time but
> don't
> want to be wasting my money and time.
> Greg
> K9IG
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