On Tue, 19 Sep 2006, Ron D'Eau Claire wrote:
Y'know there was actually a time when a fellow could tune across a band,
especially 80 or 40, and immediately recognize various stations by the
keying characteristic of their rig and their fists on a mechanical key.
Different stations had
This discussion is very interesting to me. I hate copying stations
whose keying isn't sharp enough. The dits and dahs seem to blend
together. It seems to me that with all the DSP power that modern rigs
have, there should be a way to sharpen up a CW signal to make it
more intelligible. I'm
At 09:13 AM 9/20/2006, Martin Gillen wrote...
Which FCC or ARRL guideline mentions chirp, or otherwise attempts to
regulate the keying waveform?
97.307(a) No amateur station transmission shall occupy more bandwidth than
necessary for the information rate and emission type being transmitted, in
As long as we are discussing hearing cw I'd like to ask a question that has
been bothering me for many years. I am very sensitive to chirp, and that is
not what I am referring to. When I listen to a good cw signal in the range
of about 20-35 wpm I heard the dots and dashes as at slightly
Dan KB6NU wrote:
This discussion is very interesting to me. I hate copying stations whose
keying isn't sharp enough. The dits and dahs seem to blend together. It
seems to me that with all the DSP power that modern rigs have, there
should be a way to sharpen up a CW signal to make it more
Thanks Dan for copying me. I just subscribed to the list.
The issue is discussed at length by Doug Smith, who is also the Editor
of ARRL's QEX.
http://www.doug-smith.net/cwbandwidth1.htm
In the digital communication world, we have a baseband modulation
scheme called Pulse Amplitude
Bob:
As you correctly note, a CW signal is not a pure sinusoid. The
Fourier spectrum of an individual dot or dash is a distribution of
frequencies with a peak at the dead carrier frequency. There is an
inverse relationship between the width of a pulse in the time domain
and the width of its
Yes, 47CFR97.307 (Mike quoted below) is the regulation that is usually
referenced by an ARRL Official Observer (OO) reporting chirp.
Of course, the regulations do NOT provide specific parameters nor have I
heard of the US Federal Communications Commission (FCC) ever issuing a
citation for clicks
Hi Bob,
As long as we are discussing hearing cw I'd like to ask a question that has
been bothering me for many years. I am very sensitive to chirp, and that is
not what I am referring to. When I listen to a good cw signal in the range
of about 20-35 wpm I heard the dots and dashes as at
Hello All,
If anyone is interested in playing on an Elecraft
Builder team for CQ WW DX (CW at least, not sure if I
will play on SSB or not), I'd handle the filing
required.
Teams can consist of up to 5 members from anywhere on
the planet, and do not affect your ability to apply
your score to
I enjoy putting together and playing with simple wire antennas for field
operations. I have also been fortunate to enjoy moderate success with my
efforts.
However I am looking to refine my approach in an effort to make my systems more
efficient. My approach in the past has been to follow
[EMAIL PROTECTED] wrote:
...
I have read several articles and books on antenna building but have missed
anything that addresses this aspect of antenna construction. That is not to
say that it hasn’t been discussed only that I have not seen it.
You might benefit from a visit to the DX
On Wed, 20 Sep 2006 10:57:15 -0400, Stephen W. Kercel
[EMAIL PROTECTED] wrote:
In cognitive processing of sensory data, the brain functions a
differencing engine. Each brain has a capability of distinguishing
audible spectra, but some are more sensitive to particular nuances of
difference than
A couple years ago someone on the reflector hosted a site everyone could submit
pics of their workbenches they built their K2s K1s what have you. I searched
in the archives and couldnt find it. Anyone remember the site or if its still
active? I have house now with a garage now, been looking
Hi all,
For our KX1 talk at Pacificon, we'd like to show some examples of how
operators are using the rig, whether in the field or at home. Have you
used the KX1 in a difficult location -- say, sitting in a tree? Hanging
over a cliff? Riding a bike? Lying on the couch (while the rest of the
In a message dated 9/20/06 6:29:25 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
My conscious brain only reports differences, not absolutes.
How can that be, assuming you were able to learn to read and write, speak and
understand speech?
The
result is that 'dash dash dot dash'
If you're anywhere near San Diego this weekend, please visit us at the
annual ARRL SW convention. We'll have some new mini-module kits with
us, including a wattmeter with computer interface; an analog audio
filter with bandpass and lowpass functions; and a six-section, 40-dB
step attenuator.
~
N2CQ QRP CONTEST CALENDAR
September 23 - Oct 23, 2006
~
CQWW RTTY DX Contest ... 150w Category
Sep 23, z to Sep 24, 2400z
Rules:
18 matches
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