S56A added:
VR2BG/p wrote: How many wrong frequency spots are there on RBN?
I had short 10 minutes CQ run in ON UBA CW contest this morning with 100 W
and tribander on 14025,75 kHz.
RBN had 3 spots on 14025,7 kHz, 31 spot on 14025,8 kHz and 10 spots on
14025,9 kHz. No bad spots.
They all fit within my sharp 250 Hz CW filter on third 455 kHz IF. No
sweat
apart from occassional zero beat.
No wrong-freq RBN spots of me from XV when I was there last summer,
Marijan - but I was barefoot too & far enough away from all the skimmers
for any of the mechanisms behind the wrong-freq spots to manifest
themselves, IMHO.
Instead, take ALL the RBN spots for an entire day & then look for same
call (not just your own) spotted at exactly the same time on either a
different band or frequency (say >1 kc away) from any other spot of the
same call.
I need to correct my previous post - when looking for spots NOT at
exactly the same time, you will find one wrong-freq spot matches up with
multiple correct-freq spots. If you look for spots at EXACTLY the same
time, they tend come in pairs (a correct one matches up with the wrong
one; also wrong one matches up with the correct one), so total number of
wrong-freq spots can be found by dividing by two. To get a feel for how
bad it is in a more realistic within-a-minute-or-two-of-each-other (or
possibly where call is same other than one character) is beyond my
ability with this new-fangled database stuff.
It could be that during the five minute period I found on 2012-03-08
where UA9CDC was spotted on three different bands, Igor was really
there. Or maybe he had one of those fecal signals he mentioned in his
post... though there is a mechanism responsible for
same-or-close-kc-but-different-Mc RBN spots.
Though every non-weekend day I've looked at RBN data I see all the
various wrong-freq spots & if there was a way to get a feel for how many
they were & that were added to all the busted call spots, I believe the
total is more significant than the techno-crowd would like to admit.
73, ex-VR2BG/p.
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