[TowerTalk] Tower and antenna decisions

[EZ Rhino]

Same here Rick...just went over my SWR graphs on the old T6 I just took down.  20m is the worst case scenario with almost 2:1 SWR at the bottom of the band, and decreasing as you tune up.  Every other band the SWR is below about 1.8, and in some cases (17m-all, 15m-all, and all of the SSB part of 10m) it is below 1.5.  This was measured looking into about 120 feet of Buryflex coax.  It is also  important to note that the T6 is the smallest of the Tennadyne logs and has the worst SWR of the line.  The bigger you get, the lower/flatter it gets.  

So I guess it depends what you consider "mediocre"...for the cost difference between a T6 and a SteppIR you could buy an amplifier.  I'd rather have the amp :-)

Chris
KF7P




On Oct 26, 2013, at 11:56 , steve jobes wrote:


Rick I disagree with your statement. As a owner of a Tennadyne T-10 and currently a T-12 your statement is flat out wrong. I swept my T-12 with my rig expert AA-230 analyzer and it was below 2-1  across the 13-30 mhz. range. Not sure what you are talking about, OR WHAT BRAND. But to say mediocre SWR is a false statement.

73,
Steve W1DXH 


-----Original Message-----
From: Richard (Rick) Karlquist <richard at karlquist.com>
To: towertalk <towertalk at contesting.com>
Sent: Fri, Oct 25, 2013 7:25 pm
Subject: Re: [TowerTalk] Tower and antenna decisions



I briefly looked at log periodics and one thing
that hasn't been discussed here is the mediocre
SWR of LPDA's.  You're pretty much going to have
to use a tuner, and you also have increased feedline
loss.  Might work for some users, but I'm sticking
with my SteppIR antennas (3 of them so far).

An LPDA would however, make a good broadband receive
antenna for a skimmer, if you want to optimize
one direction.

Rick N6RK
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