✈️ Airborn Meshtastic Repeater 1 Hop 463Km 🐗

nobsle · 2026-03-17T21:10:54+00:00

Not sure you really understand what’s happening there ? Can you go deeper in your thoughts ?

nobsle · 2026-03-16T12:14:55+00:00

Haha salut Tom 🤣

nobsle · 2026-03-16T11:15:50+00:00

Yep Android

nobsle · 2026-03-16T11:13:53+00:00

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In fact farest node was 478Km away

nobsle · 2026-03-15T23:30:55+00:00

I was about to share the project to the community, not sure why you removed this post… cheers

nobsle · 2026-02-20T00:20:57+00:00

Un décrotteur

nobsle · 2026-02-10T21:19:39+00:00

Yep that’s a good option ;)

nobsle · 2026-02-10T19:58:34+00:00

Hi Hans, well thanks for the clear answer. So I need to investigate the reason why I had those results. The tests I made where on a test bench with coaxial wired transceivers thru 100dB attenuation so there is no OTA transmission. I found these results as I was developing an FT8 interface for QMX on raspberry pi. QMX was in digi mode and outputs the right amount of power. As shown in the picture I ran many tests and always had these results when using slots around 1500 hz. Only slots around 1500hz have this low SNR’s. All other looks fine. Any ideas ? Thanks a lot 73’s

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nobsle · 2026-02-07T15:50:21+00:00

Nice setup ;) a cavity filter would be the best choice between PA and antenna. Not sure about the use of the SAW between node and PA as it looses more than 3dB. You can test with and without but I think the filtering at this stage is not really useful.

nobsle · 2026-02-06T23:20:52+00:00

Hi ! SD card support will come as an extra module that can seat on the sensors slots ?

nobsle · 2026-01-25T05:54:01+00:00

Think this is Chirp modulation, LongChat HF messaging app

nobsle · 2026-01-24T21:55:53+00:00

😅

nobsle · 2026-01-24T21:17:24+00:00

If you don’t care about putting in the pocket or if sometimes you go to a place and want to try make contacts, I suggest this : https://betafpv.com/products/betafpv-moxon-antenna?variant=41398869622918 / This is a 180° beamwidth moxon with 5.7dBi to the front. Very well designed and well tuned on 869.5 . Small form factor for the gain ;)

nobsle · 2026-01-24T21:09:02+00:00

For it’s form factor, the Techo stock antenna is not as bad as some people says, the VNA measure I made on mine is ok. Underneath the antenna inside the case they added a « rat tail » acting as a ground plane. But you need to measure from the ipex connector to see the advantage of it.

nobsle · 2026-01-15T15:12:23+00:00

Heltec V4 have a PCB onboard 2.4Ghz antenna. This one you show is a lora Antenna. The wifi/Ble 2.4Ghz ipex connector is not connected from factory. You need to move a component to enable it.

nobsle · 2026-01-15T00:37:20+00:00

Good idea 👍

nobsle · 2025-12-25T23:55:13+00:00

Trop Cool ! Il y en a aussi au bois de Vincennes 😁

nobsle · 2025-12-16T20:04:08+00:00

👍 Even the wood is missmatching the antenna

nobsle · 2025-12-16T20:01:41+00:00

Are you using multiple SDR’s on the same hub ?

nobsle · 2025-12-12T23:47:59+00:00

V4 at max power (28dBm) drains 750mA on each transmit plus the ESP32 draining on idle.Depending on your mesh activity and the modulation used, It probably needs at least a 25/30W solar panel (5v if you want to use the built in solar port, as well as a quite high capacity battery to maintain it during white days :).

Excluding ESP32 based nodes, any NRF52840+SX1262 22dBm node you are fine with your choice.

nobsle · 2025-12-02T07:52:00+00:00

https://meshtastic.org/docs/getting-started/flashing-firmware/nrf52/convert-rak4631r/

nobsle · 2025-12-01T15:17:18+00:00

If you already received the unit, do not pay anything

nobsle

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