> For RTTY, it generally is about 2-5 kHz, but this is not a firm rule by any
> means.
I just went and looked at some of the past where I had noted down the actual
splits (in kHz) when I have worked RTTY DXpeditions.
9M0C +2
TL5A +2.5
3D2DX +5
ZL9CI +6.2
5C8M +1.5
FO0AAA +22.9 (10m, N6TQS op)
FO0AAA +2 (20m)
T32B +2
TX0DX +5 (Trey op)
4W6GH +10
8P9JU +3.5
FO0WEG +1
K5K +8 (Garry op)
D68C +1.8
K1B +0 (10m, N6TQS op, I was second QSO, so probably not split yet)
K1B +0.5 (20m)
K1B +2 (15m)
C56/DL6CM +2.35
A25/JA1ELY +5
TG0R +3
3D2CI +1.9 (20m)
3D2CI +5.55 (10m)
TI9M +2 (15m)
TI9M +1 (20m)
CE0Y/DM5TI +3.2 (15m)
CE0Y/DM5TI +1.4 (20m)
XR0X +1
HH4/K4QD +5 (20m)
HH4/K4QD +5 (15m)
P5/4L4FN +5
3XA8DX +2
CY0MM -2 (down)
AH3D +14 (15m)
TZ6RD +2
T32N +5
5W0SS +2
T33C +1
C21DL +3
3Y0X +14
ZK1YAQ +1 (30m)
YJ0ADX +2
ZL8R +2
XF4DL +2 (17m)
N8S +2.8 (20m)
N8S +3 (15m)
N8S +2 (12m)
N8S +1 (30m)
N8S +0.3 (30m, PSK31, 300 Hz split)
N8S +0.3 (17m, PSK31, 300 Hz split)
VP6DX -7 (20m, down)
VP6DX -8 (30m, down)
VP6DX -4 (17m, down)
TX5C +16.5 (30m)
TX5C +11.6 (20m)
TX5C +2.1 (40m)
K5D -3 (30m)
K5D -4 (17m)
VP6T +4
HK0NA +2
Some ops obviously consistently preferred down instead of up (like Ducie and
Desecheo).
Clipperton operations appear to always be in demand for some reason. Worse
case FO0AAA in 2000 was +22.9 up, and TX5C in 2008 was +16.5 up.
Swain's ops (or op) appear to like close splits (check out the PSK splits :-).
But it probably is not op specific, but conditions specific, since Doug N6TQS
was at FO0AAA's keyboard at +22.9, but he was also at the keyboard for K1B for
barely any split for the times I worked him.
I didn't do a histogram. But most appear around 2 kHz, some as close as 500 Hz
and the worse case is the 2000 Clipperton at 22.9 kHz!
There could also be a tendency for larger splits for higher bands, but nothing
conclusive enough statistically (I don't work much DX :-).
73
Chen, W7AY
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