Topband: Rig Comparisons

[James Wolf]

Rick,

Is the report public? Do you have a link to it?

Jim - KR9U

-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Richard
Karlquist
Sent: Saturday, August 02, 2014 9:17 PM
To: topband at contesting.com
Subject: Re: Topband: Rig Comparisons

On 2014-08-02 17:46, Paul Christensen wrote:
> 
> Their implementation of adaptive pre-distortion (APD) works very well 
> even without "well behaved" amps and substantial IMD improvement is 
> easily attained with existing bipolar transistor, FET, and vacuum tube 
> amps.  I have personally witnessed 3rd-order IMD improve from -30 dBc

This doesn't even sound like the same system that was in the report.  Always
good to have a second opinion.
Maybe you should have written the report.  The report mentioned how critical
it was to get the input signal just below clipping and it required the user
to ride the gain.  Doesn't sound adaptive to me.  I guess we will have to
wait for a larger number of users to try this in the real world and see how
reproducible it is.
Interesting technology.

Rick N6RK

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