Thanks for that reminder Doug. That was a good project and opportunity.
I was "all in" both years. And the only difference to any of the antennas was
changes to some localized feedlines and matching networks that had not been
designed for 1.5kW.
I will never forget calling for an LU - Zone 13 double mult on 80M around 06Z
and busting the KC1XX and WX3B W3LPL pile. I did not tell anyone that I had
jumped to HP after about a decade of LP contesting. I announced it in my 3830
posting. I later got email from half a dozen contesters who had heard me break
that pile and were relieved to hear that there wasn't something fishy going on
in Vermont.
73
Ed N1UR
-----Original Message-----
From: CQ-Contest [mailto:cq-contest-bounces@contesting.com] On Behalf Of Doug
Grant
Sent: Thursday, August 22, 2019 1:03 PM
To: cq-contest@contesting.com
Subject: Re: [CQ-Contest] CQ-Contest] Impressive demonstration of one dB of
signal strength improvement
On Thu, Aug 22, 2019 at 4:00 PM W3LPL wrote:
These recordings are an impressive demonstration of the benefit of
> one dB of signal strength improvement in a weak signal situation.
> Click on the links on this website:
>
> www.ab7e.com/weak_signal/mdd.html
>
>
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.
Test cases are hard to find, but I found one in 2014 when N1UR switched from
Low Power to High Power in the CQWW. Same op, same QTH, same antennas, and very
comparable propagation near the top of the cycle.
My conclusion: the K1JX "6% per dB" rule was about right.
The exercise for the reader is to figure out how to add dB at the best "dB per
dollar" ratio. Not all dB cost the same!
You can find some hints in a presentation I did a while back at CTU:
https://www.contestuniversity.com/wp-content/uploads/2017/06/K1DG_CTU_2015_Ten_Ways_to_Improve_your_Contest_Score.pptx
Slides 5-22 cover this topic.
73,
Doug K1DG
.
_______________________________________________
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
|