On 6/19/2021 9:48 AM, Peter Voelpel wrote:
Yes, for those who enjoy the use of the internet for contesting.
WSJT modes make no more use of the internet than contesting or chasing
DX with CW, SSB, or RTTY. Just as with those modes, the internet is used
with WSJT modes for spotting and the study of propagation.
An excellent use of the RBN system is the comparison of one antenna to
another under real world conditions. I used it this way over the winter
to chase an issue with one of my 160M TX antennas. I transmitted TEST
K9YC six times in a row on one antenna, then TEST KU6W (or club station)
six times on the other, put the spots for each into a spreadsheet. I
repeated this procedure more than a dozen times, in order to average out
the effects QSB and other variations in propagation. I then averaged the
results from each spotting location for each antenna, also noting
azimuth for each spotting location, since both antennas have modest
directivity.
I repeated this series of tests over several nights. Analysis of the
data made it clear that one of the antennas has a problem of about 9 dB,
that I hope to troubleshoot and correct over the summer. W6GJB used this
process quite effectively to evaluate an 80M vertical we had designed
and built for Field Day, compared to an inverted Vee. The vertical won
by a fair margin.
73, Jim K9YC
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