I’ve been looking for an antenna for a permanent #meshtastic node in my attic and I found this one, along with 5m RF200 low-loss cable.
I know that this setup will most likely render me ‘excommunicado’ in the #meshtasticcommunity: “thou shalt always install thy node right below the antenna!”, but here’s the thing: I want to experiment with different hardware, I want to do some interference measurements at night (ever heard about the ‘Mammotion’ lawnmower which illegally jams 868MHz?) , AND I have a powerful 2m/70cm transmitter close to it, and I don’t want EMI issues on a sensitive 5V line.
Besides, the antenna has 3dBi gain and I measured the cable loss to 1.4dB at 868MHz, so given its better location, the numbers still come out positive 🙂
See that dip near 145MHz btw.? Need to do a test to see how much signal it’ll pick up from my VHF rig - don’t want to damage my LoRa module 👌🏼🙂
#lorawan #electronicsengineering #rfengineering #rfengineer #hamradio hamr #testandmeasurement
Søren Kjærsgaard /
npub16k…jkf5d
2024-07-19 06:50:55
Author Public Key
npub16kjyxpsmyr59lshau67mq0jl279wupfeqz87y2j2djf78s96ycyqgjkf5dSeen on
wss://nos.lolPublished at
2024-07-19 06:50:55Event JSON
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