[CW] Speed vs Bandwidth

[Richard]

Hey Pedro! We all still love ya' anyway!!





 --- "NA4FM (Buck)" <na4fm-list@towncorp.net> wrote: >
Pedro,
> 
> I originally asked the question.  While I didn't
> expect it to be such an
> elaborate or technical response, I did learn
> something from it.  I have
> been following the thread which has diverted a
> little to a few people
> disagreeing with each other, but in a most peaceful
> and respectable way.
> 
> 
> I appreciate all the responses I thus far.  I am
> sorry you aren't tuned
> into this topic with the same attitude I and some
> others are.  
> 
> I wish you well in finding a topic for your "younger
> fellows", but
> please respect those of us willing to learn more
> about the advanced
> theories and practices.
> 
> Thank you.
> 
> Buck
> 
> > -----Original Message-----
> > From: Pedro J. Santa [mailto:pjs123@attglobal.net]
> 
> > Sent: Monday, March 15, 2004 11:40 PM
> > To: David J. Ring, Jr.; George, W5YR;
> cw@mailman.qth.net
> > Subject: [CW] Speed vs Bandwidth
> > 
> > 
> > Hi all:
> > 
> > I've been following (or trying to) the multiple
> exchanges on 
> > the referenced topic--most of which are really
> devoted to 
> > esotheric postulates and futile diatribes, to say
> the least.. 
> > I don't think I've learned much of any
> significance from this 
> > long, just too long,  string of messages regarding
> this 
> > impractical and theoretic subject.  I can only say
> that this 
> > hogwash has not really added much, if anything, to
> my 
> > enjoyment of the hobby--much less to my passion
> for Morse 
> > Code.  If our younger fellows were reading the
> colloquy about 
> > this nonsense, they would just join the ranks of
> those who 
> > claim we ham radio operators have "lost it"...
> > 
> > 73 Pedro..
> > 
> > P.S. Morse Code is forever...
> > 
> > 73 Pedro KP3X----- Original Message ----- 
> > From: "David J. Ring, Jr." <n1ea@arrl.net>
> > To: "George, W5YR" <w5yr@att.net>;
> <cw@mailman.qth.net>
> > Sent: Tuesday, March 16, 2004 12:09 AM
> > Subject: [CW] We agree - Speed vs Bandwidth
> > 
> > 
> > > W5YR wrote:
> > >
> > > Grab your 2003 ARRL Handbook and look at Fig.
> 12.21 on Page 
> > 12.13 - I 
> > > imagine that the 2004 and 2002 books have the
> same content in about 
> > > the
> > same
> > > location.
> > >
> > > Fig. 12.21 is a graph that relates bandwidth to
> rise/fall 
> > time. Keying
> > speed
> > > does not enter into the graph at all for the
> spectral width 
> > > determination. It does indicate the maximum
> keying rate for 
> > a K=3 and 
> > > a K=5 circuit for a given bandwidth. Nowhere in
> the material on CW 
> > > keying could I find any mention of keying rate
> influencing 
> > bandwidth.
> > >
> >
>
//////////////////////////////////////////////////////////////
> > /////////////
> > >
> > > I really wold like to see what they say for
> maximum keying 
> > rate at K=3 
> > > and K=5 - can you post that?
> > >
> > > I agree with you - and your observations agree
> with me! - the 
> > > bandwidth
> > goes
> > > up with code speed, but the bandwidth is much
> more affected by the 
> > > wave shape.
> > >
> > > So - we've exhausted that interesting topic.  We
> agree!  How boring!
> > >
> > > I might make a sound file and feed it into my
> IC-756PRO and 
> > change the 
> > > "voice rate" as I mentioned - that would be a
> hoot.  I am sure the
> > bandwidth
> > > would go up with the voice rate pulses - so we
> could have a 
> > new thread
> > about
> > > bandwidth goes up when you talk fast (or at
> least if you make faster
> > > pulses!)  But we need a new email reflector -
> how about "CW 
> > guys who 
> > > think they're SSB operators" email list?
> > >
> > > George, you can find the relationship between
> keying speed (baud or 
> > > baudot
> > > rate) and bandwidth here on the ITU web site:
> > >
> > > http://life.itu.ch/radioclub/rr/sm1138.htm
> > >
> > >
> > > AMPLITUDE MODULATION
> > > 1. Signal with Quantized or Digital Information
> Continuous wave
> > telegraphy,
> > > Morse code Bn = BK
> > > K = 5 for fading circuits
> > > K = 3 for non-fading circuits
> > >
> > > 25 words per minute; B = 20, K = 5 
> Bandwidth:100 Hz
> > >
> > > Telegraphy by on-off keying of a tone modulated
> > > carrier, Morse code Bn = BK + 2M
> > > K = 5 for fading circuits
> > > K = 3 for non-fading circuits
> > >
> > > 25 words per minute; B = 20, M = 1 000, K = 5
> > > Bandwidth: 2 100 Hz
> > >
> > > 73
> > >
> > > David Ring, N1EA
> > >
> > > _______________________________________________
> > > CW mailing list
> > > CW@mailman.qth.net
> > > http://mailman.qth.net/mailman/listinfo/cw
> > 
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> > 
> > 
> 
> 
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