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+--- Thread: Antennas for System BLUE - Mini Guide (/showthread.php?tid=1708)
RE: Antennas for System BLUE - Mini Guide - chubros - 2016-09-13
(2016-09-13, 18:12)RichoAnd Wrote: Minor difference if any
Richo if so, what do you suggest between those two. I was trying to make a loop for my system blue and i m a lit bit lost.
Simple loop or mobius (with or without trafo? )
I m asking cause i just have started to make a 38cm brake pipe mobius with trafo as in your example above and right now i m making my first windings.
RE: Antennas for System BLUE - Mini Guide - RichoAnd - 2016-09-13
38cm "brake pibe" appears simple and robust, and is excellent for outdoor use
/Richo
RE: Antennas for System BLUE - Mini Guide - chubros - 2016-09-13
(2016-09-13, 19:38)RichoAnd Wrote: 38cm "brake pibe" appears simple and robust, and is excellent for outdoor use
/Richo
So i shall continue my windings... 30 only left...
Ah. One more question... About the inner core should i prefer 2,5mm copper wire? Ι had plenty of 1,5mm available.
Should i use it or not?
Thanks in advance
RE: Antennas for System BLUE - Mini Guide - bazzaC - 2016-09-27
(2016-08-11, 06:31).RichoAnd Wrote:(2016-08-10, 12:11)bazzalight Wrote:(2016-05-31, 21:30)RichoAnd Wrote: Richo,
I have started making the H field Copper tube Loop antenna shown in your mini guide and also from http://users.skynet.be/DanielV37/Project_LR/Antenna/Antenna.htm#Hardware. I have produced 3D print files for the top & bottom Junctions from the drawings on that site and have published these files at http://www.thingiverse.com/thing:1713141 . I have included attribution to the design as best I could find reference. Can you have a quick look at this url and advise if any further attribution is needed.
thanks
Barry (Australia)
Have a lot of suggestions for changes - water intrusion is a challenge
By the way - time has run from this antenna - it is too large, and intended for System GREEN
Make it of brake tube 5-6 mm and a diameter of ~ 40cm
Most effective is the "Möbius" with transformer
Richo,
thanks for your earlier advice. I have just commissioned by System Blue (ID=1631) and as per your suggestion I have built a paired 38cm diam Copper Pipe loop (6mm air condition tube) with 50 turn Toroid Ferrite Transformer. After a false start with the ethernet wiring and then playing with the gain and thresholds I think it is performing quite well (noise floor about 19mV & effective detection ratios compare well to other stations in the area). I didn't worry about O ring seals at this point I will use silicon sealant later to keep moisture out (but it won't stop the ants !!)
For others wanting 3d print the top & bottom brackets (or to look at more pics to seed their own designs) I have put them at http://www.thingiverse.com/thing:1792866
regards
Barry
RE: Antennas for System BLUE - Mini Guide - chubros - 2016-09-27
(2016-08-11, 06:31)RichoAnd Wrote:Richo is that connection correct?(2016-08-10, 12:11)bazzalight Wrote:(2016-05-31, 21:30)RichoAnd Wrote: Richo,
I have started making the H field Copper tube Loop antenna shown in your mini guide and also from http://users.skynet.be/DanielV37/Project_LR/Antenna/Antenna.htm#Hardware. I have produced 3D print files for the top & bottom Junctions from the drawings on that site and have published these files at http://www.thingiverse.com/thing:1713141 . I have included attribution to the design as best I could find reference. Can you have a quick look at this url and advise if any further attribution is needed.
thanks
Barry (Australia)
Have a lot of suggestions for changes - water intrusion is a challenge
By the way - time has run from this antenna - it is too large, and intended for System GREEN
Make it of brake tube 5-6 mm and a diameter of ~ 40cm
Most effective is the "Möbius" with transformer
RE: Antennas for System BLUE - Mini Guide - RichoAnd - 2016-09-27
(2016-09-27, 15:22)chubros Wrote:(2016-08-11, 06:31)RichoAnd Wrote:Richo is that connection correct?(2016-08-10, 12:11)bazzalight Wrote:(2016-05-31, 21:30)RichoAnd Wrote: Richo,
I have started making the H field Copper tube Loop antenna shown in your mini guide and also from http://users.skynet.be/DanielV37/Project_LR/Antenna/Antenna.htm#Hardware. I have produced 3D print files for the top & bottom Junctions from the drawings on that site and have published these files at http://www.thingiverse.com/thing:1713141 . I have included attribution to the design as best I could find reference. Can you have a quick look at this url and advise if any further attribution is needed.
thanks
Barry (Australia)
Have a lot of suggestions for changes - water intrusion is a challenge
By the way - time has run from this antenna - it is too large, and intended for System GREEN
Make it of brake tube 5-6 mm and a diameter of ~ 40cm
Most effective is the "Möbius" with transformer
Yes - That is right
RE: Antennas for System BLUE - Mini Guide - Ranieri - 2016-09-29
For ferrite antennas use of heat shrink is a good idea?
RE: Antennas for System BLUE - Mini Guide - RichoAnd - 2016-09-29
They are supplied with shrink tape.
If you make them yourself, you might as well use insulating tape or "GafferTape" or any other tape or varnish
RE: Antennas for System BLUE - Mini Guide - LaurentB - 2016-10-01
Hi All,
For a multi turns loop with 25m (1.5 diamater) long copper wire we have many possibilities between diameter/number of turns.
Is there an optimum: diameter 1000mm, 3 turns or diameter 380mm, 20 turns as show in the guide or can we build any diameter/turns (inductance is an issue ?) ?
Thanks,
Laurent
RE: Antennas for System BLUE - Mini Guide - RichoAnd - 2016-10-01
Size of the signal is proportional to the total area of the loop
Read my "mini-guide" about what is necessary
Larger antennas can cause problems.
/Richo