[Elecraft] 43' Vertical and the K2 tuner

[Steve Ellington]

Back to the original question about using the K2's or K3's tuner on this 
antenna....Figure 4. in that link shows the impedance of the antenna to be 
less than 10 ohms below 5 mHz and around 1 ohm on 160M. Factor the  1:4 
balun in and that divides the Z by 4. So we end up with an impedance of less 
than 2 ohms presented to the K2's tuner. Open the windows and let the smoke 
out please.

Steve Ellington
N4LQ at carolina.rr.com
----- Original Message ----- 
From: "Paul Christensen" <w9ac at arrl.net>
To: "Steve Ellington" <n4lq at carolina.rr.com>; <Elecraft at mailman.qth.net>
Sent: Sunday, March 15, 2009 10:07 AM
Subject: Re: [Elecraft] 43' Vertical and the K2 tuner


>> The 43' vertical is recent fad and it makes no sense at all. Virtually
>> any trapped multiband vertical should easily outperform it.
>
> Steve,
>
> I thought the same until I read this:
>
> http://vk1od.net/antenna/multibandunloadedvertical/
>
> According to the author, the so-called "magic" of the 43-foot length is 
> that
> radiation resistance remains quite high across the HF spectrum and thus,
> system losses are minimized.  Compared to a 33-foot vertical, system 
> losses
> are much lower across the spectrum.
>
> But to your point, a trapped multi-band vertical can offer similar
> performance.  Personally, I think the negativity associated with trap loss
> in multi-band antennas is grossly overblown.  Other systematic losses mask
> what little loss exists in most trapped antenna designs.
>
> Anyway, not sure how valid all this data really is, but the data presented
> is interesting
>
> Paul, W9AC
>


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