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Date: Thu, 28 Nov 2002 00:45:18 -0800
From: Wayne Burdick <n6kr at elecraft.com>
Organization: Elecraft
To: Bob - AG5Q <AG5Q at attbi.com>
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Antenna Tuners

Thanks for this useful reference, Bob.

Both the KAT2 and KAT100 (like other autotuners) have significant stray
reactances that are unique to their PCB layout, relay types, etc. So the results
obtained by looking at just the L-network components themselves may be
misleading, especially on the highest bands. Still, the answers should be in the
right ballpark.

The good news is that the tuners are very good at tuning out thier own strays.

73,
Wayne
N6KR


Bob - AG5Q wrote:
> 
> A nice javascript program on this page:
> 
> http://www.hoflink.com/~mkozma/match19c.html
> 
> will enable you to see if  a particular antenna can be tuned with the KAT2
> or the KAT100.
> 
> The second and third circuits on the page correspond to the circuit
> configurations
> implemented in these tuners.

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Reply-To: <rondec at easystreet.com>
From: "Ron D'Eau Claire" <rondec at easystreet.com>
To: <elecraft at mailman.qth.net>
Subject: RE: [Elecraft] KAT100 Question
Date: Sun, 1 Dec 2002 16:39:46 -0800

I'll add to Dave's comment that the L-match circuit in the KAT100 should
be more efficient than a T-network type ATU. T-network tuners are
"common" but definitely not "preferable" if one is going for lowest
losses overall.

Ron AC7AC
K2 # 1289

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