[Amps] article in Nature, modified Aurora via HF

[R.Measures]

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.