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+--- Thread: You should try to build your own loop antennas. (/showthread.php?tid=4292)
You should try to build your own loop antennas. - Alidigitaly - 2026-08-28
Great! I would love to see a complete step by step video on how to that :-)
Or a proper detailed instruction would be great instead of https://docs.lightningmaps.org/hardware/antennas/hfield/#multi-turn , with some blurry pictures.
Where can i find such?
RE: You should try to build your own loop antennas. - Alidigitaly - 2026-08-29
Since this question is already answered in a different post, here is my 20 euro antenna:
1. I bought 11 m of 2×0.75 mm² copper speaker wire.
2. I separated it into two individual wires.
3. I made a frame from three 80 cm wooden battens, crossing at the centre at 90°—like a Czech hedgehog or “anti-tank cross.” and made some cuts at the ends to guide the wire. Also drilled some holes at the end for some tie wraps that hold the wires in place.
4. I wound each wire three times around the frame, creating two loops at 90° to each other.
5. I connected one loop to H1+/H1− and the other to H2+/H2− on preamplifier PCB 23.1.
6. I left both solder jumpers open.
7. I connected the preamplifier to my System Blue Mini and left the controller on its automatic settings.
Both channels are working, with an almost identical noise floor of approximately 13–14 mVpp.
It may not be the most elegant antenna ever built, but it was cheap, simple, and it works!
![[Image: antenne.png]](https://alexfrankes.nl/skycam/antenne.png)
RE: You should try to build your own loop antennas. - dupreezd - 2026-08-29
Alidigitaly, in reference to: 6. I left both solder jumpers open.
From the documentation of the original Blue station:-
The H-field pre-amplifier is connected with a shielded twisted pair cable (FTP, STP, S/STP, or
S/FTP) to the main board. This cable should not be placed next to the network cable. Please
keep a distance of at least 10 cm. The cable may have a length of up to 30 meters.
If you use loop antennas, than you should close (solder) the jumper for the corresponding channels at the back side of the board.
I would imagine the new Blue Basic might be the same.
BTW, great job on your first antenna build, well done.
RE: You should try to build your own loop antennas. - cutty - 2026-08-30
what's your station number so we can upgrade you?
RE: You should try to build your own loop antennas. - Alidigitaly - 2026-08-30
(31 minutes ago)cutty Wrote: what's your station number so we can upgrade you?
3304
But it says auth: not activated
I also did not receive an email after registration..