Re: [Amps] 10dB and propagation

[R.Measures <r@somis.org>]

On Feb 6, 2005, at 8:59 PM, Michael Tope wrote:

> ----- Original Message -----
> From: "k7fm" <k7fm@teleport.com>
>
> > Looking at the situation in reverse, if an amateur transmitter (even
> > operating at illegal power) can cause a non-linear reflection, then it
> would
> > be probable that power used would be at the beginning of the 
> > non-linear
> > range.  If that was so, then higher power would be much more likely to
> > trigger the non-linear reflection.  There are enough higher power 
> > stations
> > operating that the event would be reasonably common, and AT&T would 
> > likely
> > have discovered it when they were using high power in the 30's for
> overseas
> > telephone service.  That such events have not been regularly reported 
> > by
> > higher power raises a red flag.
>
> Yes, and if you compare the total energy dumped into the
> ionosphere by ham radio operators even during a contest, it's
> a piddle compared to what the international broadcasters
> are pumping out into their curtain arrays on most days. And if
> such an effect were present, it could easily be ferreted out
> with a carefully controlled experiment.

The effect in question was observed on 80m and 40m in the early morning 
between locations that were 100km to 350km apart.

>  I see no evidence as
> of yet that the subject experiment was carefully controlled
> (aside from perhaps s-meter calibration).

I used a HP-355 step attenuator set, so S-meter calibration was out of 
the equation.
> 73 de Mike, W4EF..................................
>
>
>
>
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Richard L. Measures, AG6K, 805.386.3734.  www.somis.org

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