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[Solved] Connecting External 433MHz Antenna to Sonoff 4ch Pro R3: Where to Attach Coaxial Cable?

bestia 2055 5
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 19222042
    bestia
    Level 12  
    Hello I own a receiver as per the title. I need to connect an external 433MHz antenna to it. There is a SPIRALKA factory antenna fitted.
    Connecting External 433MHz Antenna to Sonoff 4ch Pro R3: Where to Attach Coaxial Cable? Connecting External 433MHz Antenna to Sonoff 4ch Pro R3: Where to Attach Coaxial Cable? .
    Please advise where I can connect the coaxial cable from the external antenna, as the manufacturer has not provided for this.
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  • #2 19222098
    borken007
    Level 19  
    Solder one wire somewhere to the path as the antenna starts in the device, and the screen to ground.

    Ideally, this should lead to some sort of connector for the antenna on the outside of the chassis.
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  • #3 19222168
    bestia
    Level 12  
    That's what I think. But please point out exactly where. Because I checked with a meter and there is a transition from antenna to ground. It's as if there is an antenna flush to ground.
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  • #4 19231938
    bestia
    Level 12  
    Is no one able to tell me How to solder this antenna.
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    #5 19232531
    starob
    Level 29  
    bestia wrote:
    there is a transition from antenna to GND
    ..is about 75ohm , as if anyone asked :) .
    Connect the screen to GND , and the centre to the antenna and don't bother with the "transition"
  • #6 19355790
    bestia
    Level 12  
    I soldered as indicated.
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