[CQ-Contest] Radio Laws of Propagation....Have they been re-invented?
Herb Schoenbohm
herbs at vitelcom.net
Wed Feb 26 19:46:26 EST 2014
This is my first post on this reflector and I do so with caution but
extreme concern that contests at least stay somewhat competitive in all
categories. I must admit in 50 years of enjoying contests I have never
quite seen anything like this and it is repeated year after year. I
don't want to make false accusations but some station claiming to be QRP
"3.7 watts in the past or in this case "42 watts" as published on the
3830 Reflector recently, are claims so far beyond credulity that careful
examination is warranted by their claim.
Why am I concerned?..... Each year contest visitors come to this part
of the world to operate, some just for fun, but others the spend
significant money to build fine contest stations. There efforts, their
country multipliers are appreciated. Their efforts are as they should
be, duly lauded. However what is troublesome is those who come all they
way to the Caribbean and try to compete but have their efforts ruined by
others who should get the Contest Committee Pinocchio award, rather than
a beautiful plaque. My reference is for a particular station for
claiming to be QRP in the past with 3.7 watts and running the tables or
in this case "42 watts" as was the case with one entry in the ARRL CW
contest this month with a nearby SOAB LP category. My contest station
NP2P is a an adequate contest station with good antennas from near the
ocean and runs 1500 output to an Alpha 87A. Of interest is the
comparison during the ARRL CW contest of SOAB-HP of NP2P and the SOAB-LP
of KP4KE who made the claim on the 3830 Reflector that his power was
only 42 watts. Rather then make some wild accusation I sincerely ask to
look at the RBN signal levels for both stations at the same time on the
same band. If you can believe him I would like to talk to about buying
shares in my new St. Thomas to St. Croix bridge project. Here is the
rationale:
Just go to RBN and put in a spot analysis at any location on the
mainland for the ARRL DX CW this month. Pick any reporting station
like W3LPL or AA4VV or WA7LNW and compare, for Saturday February 15,
2014, the signal levels of KP4KE (42 watts) and NP2P (1.5KW) especially
on the low bands. Antennas on the low band are essentially the same.
KP4KE claims (3830 report) that has a dipole at 60' on 80 and so does
NP2P. (NP2P is 65 feet ABG. He claims on 40 meters a delta loop at 70'
and NP2P has a dipole at 65 feet. Now do you know how his claim of 42
watts to these antennas can outperform similar antennas into the
mainland locations against a station that is running (NP2P) 1500 watts?
Look at the low band analysis and please explain under what
circumstances could provide for a station (KP4KE) so consistently
stronger at the receiving RBN locations than another station (NP2P) in
the same area running 35 times the power. At times the difference is
over 10db or more in favor of the "42 watt station.". What I am
suggesting is that the evidence of a low power or as he claims "42
watts" on the 3830 Reflector requires some careful and detail
investigation. During the CQ 160 Meter SSB contest some differences were
even more striking. I made some ground wave comparisons between the
signals of Pedro, NP4A and the low power "42 watt" claim of KP4KE.
Either the laws of propagation have changed over the years but I don't
think they have. On ground wave I can tell the difference between a LP
and a HP station 150 miles away on 160 meters. After the contest I even
asked some European participants to let me know how the two stations
compared, one that claimed to be running low power and the other well
engineered and well healed station at NP4A with 200 foot towers that on
the low bands can open and close any propagation from here. The remarks
were, how can this station claim low power? "Impossible" and on and on.
This has been going on for many years. No other station can even fairly
compete in future contests if this ruse goes unchecked. If I am wrong in
my assessment, I think then the station owner in question should be
scheduled for speaking engagements at numerous DX and contest confabs.
Maybe even the Society of Broadcast Engineers would pay huge speaking
fees for someone who can support their claims in having new propagation
methods that reverse previous settled and proven theories.
Herb Schoenbohm, KV4FZ
St. Croix, U.S, Virgin Islands
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