Jim ... Since getting on topband I've only used a half-sloper hung from the
top of my 48' Delhi tower. I'm presently at 163 DXCC, mostly CW. The base of
the tower connects to ~60 buried radials of various lengths. You really need
a ground system for this antenna to work properly but my early
Have any of you folks used, or tried a half sloper aka 1/4 wave
sloper ? Loaded or otherwise ? I'm talking about say terminated up
80-90' up a tower.
I have used slopers on 75m with reasonable success, but never 160m.
Radials, elevated or on ( or in) the ground isn't happening.
Hi Andy,
I agree with David (K1WHS) that your RF Spectrum waterfall display does not
look like powerline noise as it shows very repeatable bright and dark bands
and the bright bands are equally spaced approximately if not exactly 500 Hz
apart from each other and this is not what you would
Hello Andy,
It looks like some form of man made QRM, and not power line noise. I am
very familiar with powerline noise, but our noise is at 120 Hz and yours
will be at 100 Hz, 60 vs 50 Hz) so it should sound a lower pitch than
what I am used to, but the waterfall display shows those evenly
Hi Roger - unfortunately, we have no way of telling, because too many
factors influence SNR at each individual node. If you noted that the
same RBN nodes were giving lower SNR reports than they had on previous
occasions, then I'd guess propagation must have been poor.
73, Pete N4ZR
Check out
Hi Roger,
If you go to
https://www.blitzortung.org/en/live_lightning_maps.php?map=30
and have a look at the lightning situation here, it will give you an idea
what the omni antennas for RBN nodes are putting up against. Also what
stations without directional listening antennas are putting up
Hi Andy.
I do have the same noises problem over here as you have.
I found that it isn’t a 110 KV powerline noise, but probably a broadband noise
is coming from the direction 10 ° here in JO60OK. It's very annoying. On the
800 meters US beverage (300°) the noise is S4, but on my second
Hey gentlemen,
I have a powerline 110KV nearby my beveragesthis is the sound in AM, not
strong but also not good.Is this RFI normal from the line or is this an
insulator or another problem?Here you can see a short video and hear the signal
from today.
