[OKDXA] Using Panadapters with K1N
Roger Simpson
rksimpson1 at cox.net
Sun Feb 8 20:04:23 EST 2015
Many of us are using panadapters these days. I've been reading some
chatter here by various OKDXA members about using these scopes to zero
in on the operating style of various K1N operators.
My first intro to them was back in 2005 when I bought a ICOM 756Pro3
which has a "tiny" spectrum scope. I didn't find it too useful because
generally you want to look either "down" (or more likely "up") from a
the DX's QRG to see the pileup. And with the Pro3 the DX's QRG is always
in the middle of the screen -- You can't move the QRG in such a way as
to allow you to dedicate 90% of the screen to either "up" or "down"
frequencies. Also, the nomenclature is +/- Khz from the center freq
rather than the more useful Khz. If I see a strong signal somewhere
above the DX's QRG I want to know that it is at 14034.6Mhz -- not 5.8
Khz up.
But even with this crude -- first generation -- spectrum scope it seemed
that back around ten years ago it would give me a boost because most
guys in those days were not using them AND ALSO most DXpeditions in
those days more or less used a predictable patters on where they were
listening -- maybe marching up the band by 100Hz after each QSO.
Now that "everyone" has a spectrum scope the challenge is greater
because they don't do you as much good any more. "Everyone and his
brother" knows where the DX is linstening so the DX has to spin the dial
to find a thin place in the pile where he can actually have a chance of
digging out a caller's call.
With Navassa I didn't rely much on the spectrum scope. I just used it to
bracket the pile and try to find the least congested place and then keep
blasting away.
I think the Elecraft has one of the more useful spectrum scopes. Also
maybe FLEX -- but I have not personally seem a flex demo of their
spectrum scope -- other that a YouTube video of a guy using the FLEX
scope.
If I ever get another rig I'll probably migrate to the ICOM 7600. It has
a dedicated DSP chip for the spectrum scope. The 7600 spectrum scope
allows you to listen up or down from the DX's QRG [i.e. you can set the
upper and lower frequencies for the scope's view -- independent of where
your VFO A or VFO B is set]. Also, the legend for the scope's horizontal
axis is Khz not delta Khz from a current receive frequency.
My takeaway is this. Serious DXers need a spectrum scope. But the edge
they give you is decreasing because everyone else has them.
73 Roger K5RKS
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