Yesterday I upgraded my System Blue PCB 19.3 with 2 filter IC's. Currently I'm playing with the configuration and settings and think this will take some days and different lightning situations...

I've disabled digital noise adaption in AMP1, applied and saved but there is still the warning: "Automatic noise adaptation is enabled. Controller might use lower gains to stay above noise level."

I do not use AMP2 (disabled) and don't have installed a filter here but there is also the same message.

SW is 8.3b2 and I'm in Manual mode. On the Sttaus page everything is OK.

Attached Files

Thumbnail(s)
       

I created a Facebook group in Italian, to exchange ideas suggestions etc.
https://www.facebook.com/groups/1232579776804254

Greetings!

I took a picture of the aluminum case. In the corner you will find tapped holes. Be sure to clean the pieces of metal left behind by the manufacturing process. These small pieces of metal, if left behind, can mean the difference between working and not-working.

Also, look along the rest of the edges. You may find other small pieces there as well.

Using your fingers is not a good way to clean either. These small slivers can enter your skin and cause irritation.

Best regards,
Fred N7FMH

Attached Files

Thumbnail(s)
   

Hello,

my name is Michael, i am from Austria, nearby Linz. Since a few day`s i am running a System BLUE (station id: 1650) and i decided to use a loop antenna with a diamater of 1000m and 8 turns. Is it nessasary to adjust the antenne in NS direction?

The E-Fild antenna i placed on a tree in about 5m heigth. The length is about 100mm.

Sometimes the nois is very high, my station sent 26000 signal, others arount 3000. Yesterday i tryed to use the manual mode and the ratio rises up. In the morning the nois again was very high. Now it seems to work.

Dose anybody have experince with the filter IC?

Thanks for your help

i attached a photo of my H-Fild antenna

Attached Files

Thumbnail(s)
   

Hallo Forum!

Ich möchte mal einen Denkansatz anstoßen zum Thema Loops.
Im System Blue haben wir ja 3 VV-IN zur Verfügung. Nun wäre die Frage, ob es signaltechnisch relevant und notwendig ist, separate N/S O/W Antennen anzuschließen.
Hintergrund: Die Loops und die Ferrite haben ja eine Doppelkeulencharakteristik (oder auch Doppel-Loop würde ich es nennen). Mit 2 um 90° versetzten Antennen (bei den meisten Usern wohl so) habe ich jedoch bei 45° / 135° usw. ein "Empfangsloch".  Meine Überlegung wäre jetzt gewesen, 2 Doppelloop-Kombis zu nutzen, die um 45° versetzt sind. Dazu bräuchte man theoretisch ja 4 Eingänge. Wäre es denn nicht auch möglich, je eine Lopo-Kombi parralel zu verschalten und so pro Doppel-Loop nur einen Eingang zu belegen? Oder ist das signaltechnisch usw. keine gute Idee?
Wäre mal sehr interessant den Egon oder den Tobi dazu zu hören ;-)

Schönen Feiertag!

Jens

Attached Files

  2xloop.png (Size: 2.86 KB / Downloads: 88)

I am looking for a new location. One option can only be connected to the internet via satellite. Has anybody experience with this kind of connection or are the delays too big (significantly influencing results on Blitzortung)?

Hallo Forum!

Nun isses passiert, offenbar war das Update der Firmware 8.2 auf System Blue nicht erfolgreich. Systeminterface ist aktuell nicht erreichbar und auch die Hardware bootet nicht. Bevor jetzt die üblichen Belehrungen kommen ---> wie bekomme ich das System wieder resettet oder gebootet oder anderweidig wieder zum Laufen?

Danke für Hinweise, wäre schade um die 300 EUR die ich bisher investiert habe...

Jens

Ich bin ein wenig verwirrt, da ich gelesen habe ja und auch nein.

Kann ich meine alte Green-Antennen-Anlage, so wie auf Bild, mit dem Patchkabel an die Blue-Platine anschließen? Ich habe es probiert, passiert aber nichts. Die rote LED der Greenplatte bleibt aus.

Was kann ich tun? Bedarf es hierfür auch ein Netzteil?

Attached Files

Thumbnail(s)
   

The tale of my new blue station, roughly set up for testing, improving reception and reducing noise before installing.

Only H-field at the moment as the E-Field is far too noisy placed inside the house. H-field aerials are 3 x 38 cm 20 turn (square) loops wound with 7 x 0.5 mm dia stranded mains conduit wire, approx 1.3 mm^2 cross sectional area. The three loops are currently coincident and arranged at 90 degrees to each other. Why three? Why not the system can handle three and I had enough wire, wood and hooks to make three. Also 20 turn loops don't need transformers and I don't have suitable toroids to make transformers.

The stranded wire is just too big to fit into the terminal block on the H-field pre-amp board. So I used boot lace ferrules with the wire cores only half way down before crimping, leaving half the ferrule to be crimped small enough to fit the terminals.

    Initial power up and exploration of the controller software showed horrendous noise. Traced to a poor USB power supply. I noticed while investigating this that channel 1C is most susceptible to showing noise and there where two ways it showed in the plots. One is a big signal on 1C with lower levels on 1B and 1A.

    Or a characteristic "sine wave with a kink". Fortunately I have a number of USB power supplies and one worked without interacting with the main board producing noise. Works so well you can't tell if the system is running from the USB power supply or 4 x 1.2 V NiMH batteries.

    So having got rid of the PSU noise I was left with either system noise or what was being picked up by the loops. Notice that there is a regular fairly fast signal in there, working out the period showed it to be 60 kHz, it also showed as a spike in the online frequency analyser plots. MSF, a time standard transmitter, located at Anthorn about 55 km away uses 60 kHz... Filter chips purchased and installed. Eye sight just about up to it and cut off frequency set to 50 KHz, bye bye MSF.

    No MSF but there is still something there that isn't random noise. Note that it's frequently in phase on 1A and 1B and out of phase on 1C. Doing the maths on the period shows this to be around 20 kHz. Along with Anthorn there is Skelton (about 30 km away). Both of these stations are believed to use frequencies around 20 kHz for communications with submerged submarines. This is effectively an "in band" signal so I guess I'm going to have to live with it and try an null it out on at least two of the loops by careful positioning of them.

    Finally for comparison this is what I get with the loop RJ45 unplugged from the main board. Notice there is no regular signal in phase across the channels and more higher frequency elements. Apart from the second plot all these plots are with the system in manual mode and no change to the plot scales.

Reception doesn't appear to be much of a problem, the system is picking up signals from Tunisia around 2,500 km away and being used for locating strikes in Southern France. This is with the loops leaning against an internal stud wall inside a building with 18" thick exterior stone walls. The loops will eventually end up in a loft. E-field might be more of a challenge to get it far enough away from the house.

--
Cheers
Dave.

what is the difference between pcb 20.3 and pcb 20.2?