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+--- Thread: New member, having some problems with H-field big interference bursts.. (/showthread.php?tid=2722)
RE: New member, having some problems with H-field big interference bursts.. - michidragon - 2018-09-15
Thanks! I'm sure i'll be around here to perfect the tuning with you old wizards! …. Now if I can only get my forum Participant access working...
RE: New member, having some problems with H-field big interference bursts.. - dupreezd - 2018-09-15
(2018-09-15, 19:32)Michidragon Wrote: Thanks! I'm sure i'll be around here to perfect the tuning with you old wizards! …. Now if I can only get my forum Participant access working...
Double check your Processor-ID and username you entered on the BO station information page. It seems the controller is not associated with your username.
RE: New member, having some problems with H-field big interference bursts.. - michidragon - 2018-09-15
(2018-09-15, 19:36)dupreezd Wrote:(2018-09-15, 19:32)Michidragon Wrote: Thanks! I'm sure i'll be around here to perfect the tuning with you old wizards! …. Now if I can only get my forum Participant access working...
Double check your Processor-ID and username you entered on the BO station information page. It seems the controller is not associated with your username.
See, this is strange:
On my controller/BLUE page:
Processor ID: (matches but not putting it here)
User-ID: 1779
Station-ID: 2284
On the blitzortung.org page:
Processor ID: (matches exactly what's in my controller)
User Number: 1779
User name: michidragon
Station number: 2284
And am definitely nagivating from "Further Info -> Forum" after logging in....
Just tried changing username capitalization to match -- that didn't work either.
Did you guys have to create a forum account and a blitzortung.org account separately? (I had to, just making sure that's normal.)
RE: New member, having some problems with H-field big interference bursts.. - dupreezd - 2018-09-15
Sorry, I don't have any other suggestions. Maybe some of the other members will be able to assist.
Quote:Did you guys have to create a forum account and a blitzortung.org account separately? (I had to, just making sure that's normal.I did not had to create a separate or new account. My username was blue, just like yours now, when I first registered. My username turned green after I registered my controller.
RE: New member, having some problems with H-field big interference bursts.. - allsorts - 2018-09-16
There is some "magic" going one between a blitzortung forum login and the blitzortung login. Trouble is being "magic" it's not readily understood or documented(*).
You say your forum and blitzortung usernames are the same, good. I'd try logging both fully out on all devices that may be logged in. Then login to the blitzortung.org participant pages. Then from the same browser window wander off to the forums and login with the same user name as you just used to login to the participants pages. With a bit of luck the forums will now recognise you as a participant.
(*) The prceedure is documented some where, I remember reading it. I can't find it now in the obvious places.
RE: New member, having some problems with H-field big interference bursts.. - michidragon - 2018-09-17
Ok, Just tried changing Anonym to "N" as per Cutty -- but I realize the database may take a bit to update.
I'll next go on a massive log-out-of-everything rampage and we'll see if that helps too.
RE: New member, having some problems with H-field big interference bursts.. - VA_LM_Blue - 2018-09-17
Looking at your "last signal" plots on lightningmaps.org you have a significant noise source in the 60-KHz region.
RE: New member, having some problems with H-field big interference bursts.. - allsorts - 2018-09-17
michidragon (station 2284) yes horrible noise band centered about 60 kHz. Watching for a while it's a curious interference, it's always there at a low level but occasionally builds up over 100 uS to something quite large that remains for several seconds.
You're 77 miles (bearing 13 deg) from WWVB at Fort Colllins. WWVB is a frequency and time standard transmiter on 60 kHz with a 70 kW EIRP. The carrier from WWVB is reduced in level for 0.2, 0.5 or 0.8 of a second every second to indicate the second start and encode the actual (UTC) date/time. I have MSF, another frequency and time transmitter also on 60 kHz 30 odd miles away. That shows as a single spike not a broad noise band. MSF similary drops in level once per second but I don't see that all.
When I first saw your signal plots I thought "noisey PSU" but they are normally around 30 to 40 kHz and don't vary as much as is indicated by the plots. As WWVB is only 70 miles away that could be the source but it doesn't match what I see from MSF, ie a single spike and no big level variation.
PSU is fairly easy to check, go to the Signals page, scroll down and set the Sampling: Channel: to V_in and click start. The signal plot will now show you what V-in looks like. It might bounce about a bit but it should be a well defined line with little or no noise.
I wonder if there is some resonance sort of thing going on between the ferrite antennas and WWVB? It doesn't take much stray capacitance to bring a ferrites resoanant frequency down to 60 kHz. Resonance being set off by WWVB would explain the slow rise over 100 uS, I'm pretty sure that the WWVB carrier actually rises and falls within a cycle.
The H field amp needs to as close to the ferrites as possible, no extending the wires. And the wires should be spaced apart, not all neat and tidy together. Try playing with the orientation of one ferrite to minimise any pickup of WWVB, there should be a well defined and deep null. With the null carefully pointed at WWVB it's signal should all but disappear.
Does doing any or all these things have any affect this 60 kHz ish noise band?
RE: New member, having some problems with H-field big interference bursts.. - michidragon - 2018-09-18
(2018-09-17, 23:10)allsorts Wrote: michidragon (station 2284) yes horrible noise band centered about 60 kHz. Watching for a while it's a curious interference, it's always there at a low level but occasionally builds up over 100 uS to something quite large that remains for several seconds.
You're 77 miles (bearing 13 deg) from WWVB at Fort Colllins. WWVB is a frequency and time standard transmiter on 60 kHz with a 70 kW EIRP. The carrier from WWVB is reduced in level for 0.2, 0.5 or 0.8 of a second every second to indicate the second start and encode the actual (UTC) date/time. I have MSF, another frequency and time transmitter also on 60 kHz 30 odd miles away. That shows as a single spike not a broad noise band. MSF similary drops in level once per second but I don't see that all.
When I first saw your signal plots I thought "noisey PSU" but they are normally around 30 to 40 kHz and don't vary as much as is indicated by the plots. As WWVB is only 70 miles away that could be the source but it doesn't match what I see from MSF, ie a single spike and no big level variation.
PSU is fairly easy to check, go to the Signals page, scroll down and set the Sampling: Channel: to V_in and click start. The signal plot will now show you what V-in looks like. It might bounce about a bit but it should be a well defined line with little or no noise.
I wonder if there is some resonance sort of thing going on between the ferrite antennas and WWVB? It doesn't take much stray capacitance to bring a ferrites resoanant frequency down to 60 kHz. Resonance being set off by WWVB would explain the slow rise over 100 uS, I'm pretty sure that the WWVB carrier actually rises and falls within a cycle.
The H field amp needs to as close to the ferrites as possible, no extending the wires. And the wires should be spaced apart, not all neat and tidy together. Try playing with the orientation of one ferrite to minimise any pickup of WWVB, there should be a well defined and deep null. With the null carefully pointed at WWVB it's signal should all but disappear.
Does doing any or all these things have any affect this 60 kHz ish noise band?
Wow, ok, let me look into that.. Yes, I am not that far from WWVB; I checked around it with SDR @ 60kHz with an old Palomar Engineers LF Probe, so I can't really see any **other** source of 60khz around.
So let me look at the power supply, first, then for anything else at 60khz or -near it-, and then i'll check my H-field config.
The wires aren't together, and I haven't extended them... they're at the length they came, but I'm wondering if after the above if maybe I should shorten them.
Will report back... Thanks for taking a look at those signals for me...
RE: New member, having some problems with H-field big interference bursts.. - allsorts - 2018-09-18
Wouldn't bother shortening them if they are spaced apart. How sensitive is the SDR at 60 kHz? I have an idea that they aren't that good down there. The controller is quite sensitive and may well "see" signals that the SDR can't.
I think your aerials are not currently where you hope to install them but maybe close to all manner of electronics/electrical stuff. It's best to place them where you would like them to be, then sort out the noise (if any) they receive there and be prepared to try a second or third place...
Another thin straw, you have used a screened cable between the H-Field amp and controller?