[Elecraft] RE: QRO

[Lou Laderman]

That makes sense Wayne. I was not faulting the tuner at all. The comment
I was responding was that having the internal tuner was an advantage of
the new amp. Its somewhat limited range may not obviate the need for a
broader range external tuner if required by the antenna system. I run
SteppIR antennas, where a tuner is not a necessity.  

Lou

-----Original Message-----
From: wayne burdick [mailto:n6kr at elecraft.com] 
Sent: Monday, May 22, 2006 6:29 PM
To: lladerman at earthlink.net
Cc: Elecraft at mailman.qth.net; 'Ed Lambert'
Subject: Re: QRO 



On May 22, 2006, at 3:33 PM, Lou Laderman wrote:

> True, but the Elecraft will only match 3:1 at 1500 watts....

Hi Lou,

The tuner can match a wider range (about 5:1) at reduced power, and 
this can automatically be handled in the amp thanks to a switchable 
input attenuator. The behavior of the tuner/attenuator in the presence 
of high SWR can be specified by the user.

An SWR range of 3:1 max is a reasonable full-legal-limit criteria for 
many operators (including our focus group) when using an internal ATU. 
This is typical of the case where nominally matched antennas are used 
on each band.

73,
Wayne
N6KR


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