[CQ-Contest] Impressive demonstration of one dB of signal strength improvement

[rjairam at gmail.com]

I always thought speed was dependent on the length of fades and type of
burst noise.

Faster would attempt to catch short fades whereas slower would catch longer
fades but weak S/N?

On topband my strategy is around 20wpm and sometimes slower repeats. On
higher bands I would go as fast as I can (which isn’t very fast) and then
slow down for weak signals or ops who have trouble.

Ria
N2RJ

On Wed, Aug 21, 2019 at 7:38 PM Bernie McClenny, W3UR <bernie at dailydx.com>
wrote:

> For me, and I suspect for many other Topband ops, when QRN/QRM is involved
> slower is better than faster! 18-20 WPM is about the right speed.
>
> Bernie McClenny, W3UR
>
> Editor of: The Daily DX (1997-2019)
>            The Weekly DX (2001-2019)
>            How's DX? (1999-2019)
>
> Two week trial -
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>
> > On Aug 21, 2019, at 4:26 PM, Bob Shohet, KQ2M <kq2m at kq2m.com> wrote:
> >
> > I have never had the opportunity before to hear differences in signal
> strength by 1 db increments.  +1 db is clearly an advantage and a +2 db
> difference nearly obliterates the weaker signal.  Remarkable.  I wish I had
> heard this 20 years ago!    ;-)
> >
> > The differences in copy between different CW speeds is very interesting
> too.  I suspect that most contest ops will generally do better with the
> higher speeds unless they are exhausted to the point of mental impairment,
> in which case the slower speeds might work better.
> >
> > Thanks for posting this Frank and a special thanks to AB7E for creating
> these audio recordings with explanations!
> >
> > 73
> >
> >
> > Bob, KQ2M
> >
> >
> >
> > From: donovanf at starpower.net
> > Sent: Wednesday, August 21, 2019 11:15 AM
> > To: cq-contest at contesting.com
> > Subject: [CQ-Contest] Impressive demonstration of one dB of signal
> strength improvement
> >
> > 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
> >
> >
> > 73
> > Frank
> > W3LPL
> >
> >
> > ----- Original Message -----
> >
> > From: "David Gilbert" <xdavid at cis-broadband.com>
> > To: elecraft at mailman.qth.net
> > Sent: Wednesday, August 21, 2019 7:02:21 AM
> > Subject: Re: [Elecraft] KPA500 Coax size requirements
> >
> >
> > That's not a universally true statement.
> >
> > Several years ago I was trying to decide which antenna to buy, and my
> > choice came down to two antennas that were 2 db apart. I created some
> > audio files by recording typical band noise and then overlaying them
> > with recorded CW messages at various strengths. The difference between
> > 1 dB above the noise level and 2 dB above the noise level can make the
> > difference between no copy and copy. The files and testing methodology
> > can be found here:
> >
> > http://www.ab7e.com/weak_signal/mdd.html
> >
> > If you're ragchewing it doesn't matter, but if you're trying to make a
> > contact and your signal is at the level of the mud it does.
> >
> > 73,
> > Dave AB7E
> >
> > On 8/20/2019 9:18 PM, Jim Danehy wrote:
> >> ONE DB loss is the LEAST DETECTABLE amount a human can detect. Hardly
> if not impossible to notice.
> >>
> >> Jim
> >> W9VNE/VA3VNE
> > _______________________________________________
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>
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