LoRa coaxial collinear antenna test

Finally a test with DIY collinear coaxial antenna for LoRA nad Helium miners on 868MHz. Amazing good results.

[iamkian]

Thank you for sharing.
I'm going to stick with my original antenna for now :-)
By the way. I've now got my SDR radio connected to a rtl_tcp server running on Raspberry Pi.
Now I can access the SDR radio over my LAN (TCP), using the SDR++ or SDRSharp radio software!
It works really good.

[iamkian]

Small tip over AirSpy SDR. If you right click on the screen when hovering over the signal strength window it will remember the highest value :-)
When it gets stronger it will update to that value. Easy for testing antenna position/tuning.
Right click again to turn it off.

[generalawareness]

Word of warning on that antenna but cover that tip if outside because it will get a white crystalline powder like stuff in it that degrades it fast. Water (from humidity, and rain) will ingress that really does a number on the signal. Just use a dab of silicone from the jacket up to the tip of the copper of the centre conductor then let it cure for 24-48h and all done.

[kevinkomlos]

Our collinear was 2 days in test and not good but it was in weird week when was only sending 1 or 2 beacons in 2 hours.. and now 3/4 in 1 hour so should be ok because its back on original bobcat antenna but tomorrow is going back 0.5 mast from windows so I hope it will work good as you describe, nice video❤

[chessdachaska]

Hello,
do u think if u use h155 coaxial can improve reception?

[GeertDroid]

Very nice experiment.
You schould build the same CoCo antenna with LMR400 coax cable instead of RG58.
RG58 is the biggest crap you can use on such frequency.
If you really need to be a thinner cable equal to RG58 you schould use LMR240.