English translation is two posts below.
Jeg har et gammelt hus med tykke tømmervegger og tak - og har problemer med å nå alle enheter. Jeg har kjøpt to antenner som selges på ebay http://www.ebay.com/itm/Antenna-433MHz- ... 1228397173 og http://www.ebay.com/itm/Antenna-433MHz- ... 1228397268 - den siste hjalp litt, men ikke mye.
Så kjøpte jeg den store antennen hos Conrad http://www.conrad.se/ANTENN-433MHZ-50-O ... &pi=190073 den var bedre - men ingen av temperatursensorene fungerte (Viking fra Teknikkmagasinet), selv ikke en som var i samme rom bare to meter unna.
Jeg har også prøvd å lage bedre antenne i GAO-modellen til ClasO. http://www.clasohlson.com/no/Ekstra-mot ... r361859000 og den lille http://www.clasohlson.com/no/Fjernstyrt ... ck/36-3570 Antennen er en liten streng 1/8-dels bølgelengde lang = 8,64 cm. Hovedproblemet var å få kjøpt skrujern til de rare skruene. Og ettersom jeg har både Anslut og Nexa og temperatursensorer - så anser jeg det som en nødløsning å gjøre det.
Overgangsplugg til Conrads antenne kjøpte jeg på ebay http://www.ebay.com/itm/SMA-Male-Plug-t ... OC:US:3160 for under 10 kr inkl frakt.
Jeg laget så en antenne selv, jeg brukte en vanlig kabel, den ene enden stakk jeg inn i hullet midt i pluggen og den andre enden festet jeg rundt metallet utenfor (det blir altså en sluttet krets), og skrudde pluggen på Tellstick. Kabelen festet jeg i en sløyfe i taket på loftet, det er der jeg har min Tellstick Net. Det fungerer MEGET bra, jeg når alle min 20 devicer og sensorer.
Lengden på kabelen er viktig, den skal være lik bølgelengden som er 69,14 cm, eller 2, 4, 8 ... ganger lengre, eller 1/2, 1/4 del... Jo lenger kabelen er jo bedre, siden jeg har god plass på loftet brukte jeg 4xbølgelengen = 276cm. Konklusjon: enkelt, billig og svært bra. Mye bedre enn alt annet jeg har prøvd.
How to make a much better antenna
Moderator: Telldus
How to make a much better antenna
Last edited by florrepus on Sun Jan 05, 2014 9:03 pm, edited 2 times in total.
Re: Tips for bedre antenne
I am sorry, this should be posted in the swedish section, and I do not know how to delete it from the english.
Re: Tips for bedre antenne
You can translate the last part of it to English:florrepus wrote:I am sorry, this should be posted in the swedish section, and I do not know how to delete it from the english.
Seems like you made a dipole or a loop antenna?
Re: Tips for bedre antenne
I have an old house with thick log walls and ceiling - and have trouble reaching all devices. I bought two antennas being sold on eBay http://www.ebay.com/itm/Antenna-433MHz- ... 1228397173 and http://www.ebay.com/itm/Antenna-433MHz- ... 1228397268 - The Latest helped a little , but not much.
So I bought the large antenna at Conrad http://www.conrad.se/ANTENN-433MHZ-50-O ... & pi = 190073 it was better - but none of temperature sensors work ( Viking from Teknikkmagasinet), even one that was in the same room just two meters away.
I also tried to create better antenna in the GAO model to ClasO . http://www.clasohlson.com/no/Ekstra-mot ... r361859000 and the little http://www.clasohlson.com/no/Fjernstyrt ... ck/36-3570 The antenna is a small string 1/8-dels long wavelength = 8.64 cm . The main problem was to buy screwdrivers to the weird screws. And since I have both ANSLUTA and Nexa and temperature sensors - so I consider it as an emergency measure to do so.
The transition plug for the Conrads antenna I bought on ebay http://www.ebay.com/itm/SMA-Male-Plug-t ... OC : U.S. : 3160 for under 10 $ including shipping .
I used this and made as an antenna myself. I used a regular cable, one end I stuck into the hole in the plug and the other end I attached the metal around the outside (it is thus a closed circuit / a loop), and turned the plug on TellStick. The cable I attached as a loop in the ceiling in the attic, that's where I have my TellStick Net. It works VERY well, with all my 20 Device and sensors.
The cable length is important, it must be equal to the wavelength which is 69.14 cm , or 2, 4, 8 ... times longer , or 1/ 2, 1/4 part ... The longer the cable the better , since I have plenty of room in the attic , I used 4xbølgelengen = 276cm . Conclusion : simple, cheap and very good. Much better than anything else I 've tried.
So I bought the large antenna at Conrad http://www.conrad.se/ANTENN-433MHZ-50-O ... & pi = 190073 it was better - but none of temperature sensors work ( Viking from Teknikkmagasinet), even one that was in the same room just two meters away.
I also tried to create better antenna in the GAO model to ClasO . http://www.clasohlson.com/no/Ekstra-mot ... r361859000 and the little http://www.clasohlson.com/no/Fjernstyrt ... ck/36-3570 The antenna is a small string 1/8-dels long wavelength = 8.64 cm . The main problem was to buy screwdrivers to the weird screws. And since I have both ANSLUTA and Nexa and temperature sensors - so I consider it as an emergency measure to do so.
The transition plug for the Conrads antenna I bought on ebay http://www.ebay.com/itm/SMA-Male-Plug-t ... OC : U.S. : 3160 for under 10 $ including shipping .
I used this and made as an antenna myself. I used a regular cable, one end I stuck into the hole in the plug and the other end I attached the metal around the outside (it is thus a closed circuit / a loop), and turned the plug on TellStick. The cable I attached as a loop in the ceiling in the attic, that's where I have my TellStick Net. It works VERY well, with all my 20 Device and sensors.
The cable length is important, it must be equal to the wavelength which is 69.14 cm , or 2, 4, 8 ... times longer , or 1/ 2, 1/4 part ... The longer the cable the better , since I have plenty of room in the attic , I used 4xbølgelengen = 276cm . Conclusion : simple, cheap and very good. Much better than anything else I 've tried.
Re: How to make a much better antenna
florrepus wrote:"
I used this and made as an antenna myself. I used a regular cable, one end I stuck into the hole in the plug and the other end I attached the metal around the outside (it is thus a closed circuit / a loop), and turned the plug on TellStick. The cable I attached as a loop in the ceiling in the attic, that's where I have my TellStick Net. It works VERY well, with all my 20 Device and sensors."
Talking about the detector,i was thinking of the metal detector for gold,have anybody ever used it?
I used this and made as an antenna myself. I used a regular cable, one end I stuck into the hole in the plug and the other end I attached the metal around the outside (it is thus a closed circuit / a loop), and turned the plug on TellStick. The cable I attached as a loop in the ceiling in the attic, that's where I have my TellStick Net. It works VERY well, with all my 20 Device and sensors."
Talking about the detector,i was thinking of the metal detector for gold,have anybody ever used it?
Re: How to make a much better antenna
I have a "farraday's cage" two floors house:
Lammi's concrete house with lot's of iron on the wall's.
This one worked for me fine ( full wave antenna), They sent it with 2.5m cable and with SMA connector, free of charge ( I requested them to do so ).
Also it included nice aluminium bracket so easy to screw it behind cabinet etc...
http://www.aliexpress.com/item/433MHz-O ... 99697.html
Lammi's concrete house with lot's of iron on the wall's.
This one worked for me fine ( full wave antenna), They sent it with 2.5m cable and with SMA connector, free of charge ( I requested them to do so ).
Also it included nice aluminium bracket so easy to screw it behind cabinet etc...
http://www.aliexpress.com/item/433MHz-O ... 99697.html
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Re: How to make a much better antenna
ebay
try search for
SMA Male Crimp RG174 GSM GPRS 433MHz Antenna Cable 1.5M
you will get one from china for about $10
worked perfect for me. Glued it at the ceiling in the livingroom and now the tellstick net covers all the area and even some other sensors.
the important thing to search for is SMA Male and GSM GPRS 433MHz.
try search for
SMA Male Crimp RG174 GSM GPRS 433MHz Antenna Cable 1.5M
you will get one from china for about $10
worked perfect for me. Glued it at the ceiling in the livingroom and now the tellstick net covers all the area and even some other sensors.
the important thing to search for is SMA Male and GSM GPRS 433MHz.