[CQ-Contest] DX Window on 75M
T A RUSSELL
n4kg at juno.com
Mon Jan 19 06:41:10 EST 1998
The JA's and VK's only have a 10 KHz window at the top of the 75M
band (which ends at 3800 KHz for most of the rest of the world).
Even in parts of the world which have wider segments, 3790 to 3800
is often the only part of the 75M band where they do not have a lot of
ARRL naively thought that the DX window would move down when
they requested 3750 to 3775 as the new Extra Class window, (or so
I have been told), increasing access and activity in the precious
3790 to 3800 DX window.
Leaving the small DX window free of domestic contest activity goes
a long way toward minimizing anti-contest sentiment. Many DXers
refrain from providing domestic contacts in the DX window. With
a little respect and cooperation, DXers and Contesters can co-exist.
Remember that an SSB signal occupies at least 3 KHz of bandwidth,
below the suppressed carrier frequency on LSB and above the
suppressed carrier frequency on USB. To keep all of your LSB
signal out of the DX window, you need to be above 3803 (and to
stay above the lower band edge, you need to be above 3753).
de Tom N4KG
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