Since in SS, you can only work once in the contest and we all know how
ridiculously slow Sunday afternoon gets for the top scorers, it would seem that
the Low Power stations can catch up somewhat over time. This is not the case
in CQWW where the rates don't drop to 10 - 20 an hour for the top scoring
stations.
It would be surprising and probably no more than coincidental if the score
change per db happened to be the same.
Ed N1UR
-----Original Message-----
From: CQ-Contest [mailto:cq-contest-bounces@contesting.com] On Behalf Of Jim
Brown
Sent: Thursday, August 22, 2019 4:54 PM
To: cq-contest@contesting.com
Subject: Re: [CQ-Contest] CQ-Contest] Impressive demonstration of one dB of
signal strength improvement
On 8/22/2019 11:55 AM, john@kk9a.com wrote:
> Many years ago, Clarke Greene, K1JX, casually mentioned that he had
> determined adding 1dB to your signal strength would result in a 6%
> increase in your contest score (mostly applied to DX contests). I
> filed that away for future reference.
The origin of this may be N6ZFO, who published an equivalent number for the
difference between LP and HP in SS. Bill worked as a statistician, and his
number came from statistical analysis of SS scores. I don't know when he first
published it, but I saw if for the first time after moving to CA and joining
NCCC in 2006 -- it was part of our strategy piece for SS. Doing the math, I
think I remember that Bill's number translated to 6% for one dB, and I
published that in an applications note about antennas, probably about 8-10
years ago.
There are several antenna applications notes on my website that NCJ wanted to
publish, but ARRL decided that there were too many graphics, and deleting them
would have destroyed the paper. One answers the question, "If could put my HF
vertical on my roof, should I" (the answer is yes). Another studies the effect
of height on horizontally polarized antennas, and produces a graph of gain vs
height for 40M and 80M. It also destroys the myth that antennas have to be low
for NVIS. Rather, I prove that low antennas are WORSE for NVIS. And it shows
that, in general, vertically polarized antennas are strongly affected by ground
quality, while the only effect of ground quality on horizontally polarized
antennas is to influence their feedpoint impedance.
The website is k9yc.com/publish.htm
73, Jim K9YC
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
|