>>Qualitative or Quantitative...<<
The above term comes from the measurement technique. I'll explain theme below.
Qualitative measurement are when the measurement of a phenomenon or object
parameter is expressed as meeting a certain criteria or is better/worst then
another one, without figures.
Ex: When we said, by measurements, the antenna A is better then the B, we
express this as a qualitative measurement.
Quantitative measurement are when the measurement of a phenomenon or object
parameter is expressed in precise figures (numbers).
Ex: When we said, by measurements, the antenna A is better then the B by 10% or
by 3dB or 5 times, we express this as a quantitative measurement.
>>Let me get this straight. If I call CQ and the band is open to Europe on 160
>>and nobody replies after a couple of hours with my TX antenna #1 with no
>>replies and after switching to antenna #2 I work a dozen stations in rapid
>>succession, that should tell me something.<<
Yes, it tells you that at that time, antenna #2 work better for that
ionospheric conditions. That's all. And, this was a qualitative measurement.
If that situation it happens in 100% of your experiments on various ionospheric
condition (ionosphere as a variable too) then it tells you that you have a
problem with the other antenna or that antenna is not acceptable for such
communication.
>>For example after calling TT8TT on 80 CW night after night without a reply (a
>>total of 14 nights without a contact) using full power and a 1/4 vertical
>>with radials, I decide to listen to the "up" frequencies to see if there was
>>an EU wall were I could find a hole to call on. Amazing there I was, as
>>strong as the Eu's calling TT8TT with a Eu SDR online RX located in Europe.
>>But why could the TT8TT op not here me after calling him from 2300 till 0245
>>(his SR)?
Any ideas?<<
I understand you frustration but...as Tom (W8JI) and other says before, we
can't afford enough antennas for every possible situation. Another thing is
that you don't know what was the receiving condition at TT8TT at that time! I
found big difference in reception 50km away with similar set-up! The SDR
receiver test is not valid except if it is installed on the correspondent
antenna!
The ideal propagation test should be conducted with a known steerable antenna
radiation pattern.
Certainly, this is a dream for us, amateurs.
73 de YO3FFF
Cristi
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Topband reflector - topband@contesting.com
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