[CQ-Contest] W4ZV's Most Disruptive Contest

[David Robbins]

Tom Rauch wrote:
> 
> > Who has 200 Khz available should use it *cum grano salis*, eventually
> > issueing his national (autarchycal) band plan but following good ideas
> > rather than old traditions. Contesting on low bands with SSB it's surely
> > most productive in intercontinental traffic if working split, but's this
> > is hard to do if the other continent  will have CW where SSB calls take
> > place.
> 
> Not so. The beauty of CW is you can notch it right out without
> hurting a wider SSB signal.
> 
> On the other hand, a wide SSB signal can not be notched from a
> narrower signal without destroying the narrow signal.
> 

on the third hand, on cw you can go to narrower rx filters and hear less of the
ssb signal.  on ssb you can notch one or maybe two cw signals, but in even a 2kc
wide ssb filter there can be lots of cw ops running narrow filters and not
caring about the ssb.

> This is traditionally why wider modes are restricted to certain areas
> away from narrow modes, while narrow modes are allowed wide
> latitude. Even in the 1940's we had the technology to remove
> narrow signals without disturbing wide signals significantly.

but it hasn't been until more recently that very narrow cw filters allow you to
do the same to ssb... assuming you are running a reasonably decent radio.  this
is a necessity now with all the ssb and am traffic on the bottom end of 10m, you
either stay away from the channel centers or use narrow filters to cut them out.

> 
> Given a choice, I'd much rather be required to notch a few strong
> CW signals from a weak SSB signal than attempt to copy a weak
> SSB signal through splatter from another SSB station!!
> 
> Any more all it takes is one button push, and the CW is virtually
> gone.
> 73, Tom W8JI
> W8JI at contesting.com
> 
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-- 
David Robbins K1TTT
e-mail: mailto://k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net


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