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Re: [Amps] article in Nature, modified Aurora via HF

To: Bill Fuqua <wlfuqu00@uky.edu>
Subject: Re: [Amps] article in Nature, modified Aurora via HF
From: R.Measures <r@somis.org>
Date: Mon, 18 Apr 2005 11:16:17 -0700
List-post: <mailto:amps@contesting.com>
On Apr 18, 2005, at 8:19 AM, Bill Fuqua wrote:

>       I think the real issue is being missed there. The real test of 
> non-linearity is the production of harmonic and intermodulation 
> distortion. This means allows measurements of nonlinearity as small as 
> a very small fraction of a percent. Even to a part per  million with 
> very specialized equipment.
>       If  there were nonlinear propagation the RF spectra would be 
> unusable.

Would CW telegraphy signals be unreadable or simply vanish?

> The apparent increase in signal strength could be  in perception.  ...

That's what I thought until I sold the Plywood Box amplifier and made 
some on-the-air measurements with a step-attenuator.

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