I wonder how you would account for propagation. The ionosphere is pretty
nebulous and it is normal for ebb and flow of 10db during a single
transmission. When it is not in that state, and there is still propagation,
it may act more like a mirror. When it is like that eg 10 meters at cycle
peak, a 5 watt mobile may be a candidate for running 30kw. Adding 10db
(Going to 15kw) may not be identifiable by just listening at several sites
unless you had a control transmitter at 1.5kw and an antenna system like
your target. I had a 50' boom 20m yagi at 100' and would routinely beat the
6L tribander a few miles away with him running full tilt 1.5kw and I thought
it was fun to run 50 watts and beat him to it. My antenna was nothing
compared to some of the big guns but it illustrates that power is not always
the answer unless all other things are equal and they usually are not.
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of David Cutter
Sent: Tuesday, November 09, 2010 3:17 PM
To: amps@contesting.com
Subject: Re: [Amps] our amplifier in 2010 CQWW
I saw a demonstration at the RSGB HF Convention: lots of SDR receivers
around the world are scanning the whole spectrum or parts of it giving
relative signal strength readings and id for each station. As I saw it,
although the strength readings were relative and not calibrated, several
within the same area would be on similar bearing and sky wave angle and,
knowing each of the stations, a data base can be constructed from which you
could determine that wildly large signals compared to all the neighbours
would indicate a statistical significance regarding their output power. The
larger the number of these receiving stations there are (and they are
growing) and the more that border the obvious transgressors, the more likely
you are to catch them red-handed. It only takes a few to produce reasonably
calibrated data to make it a powerful tool.
David
G3UNA
>I dont see how unless the station is within walking distance. Propagation
>can vary huge amounts in a very short distance.
>
> Carl
> KM1H
>
>
>>
>
>> The wider use of reverse beacons will accumulate enough statistical data
>> on
>> transgressors to dissuade them or disqualify them, there for all to see.
>>
>> David
>> G3UNA
>>
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