pfff at 2.7V that aint much of a danger, now show me 50F @ 2kV

Hmm could be that u hear the power brick of the laptop switching thru different power modes during start up. you could try to shield the laptop or parts of it to track down where exactly it comes from

? depending on how many instances you follow lemmy already allows u to scroll for like 30min before u have seen all posta of the day that u wanted to see. thats a good time. doesent need to be more

Thx for the answer, also very interesting, never heard about that FT8 audio subtraction method before but makes total sense :D

I love that guys channel, genuine good soul person

anyone actually using FreeDV for speech? i have been wondering…i only saw it as a layer over some other digital mode i think

A NanoVNA is on my to buy list and will be one of he first things ima get once i have a hobby budget again

yes, there are a few signals down there http://funknetzplanung.com/frequenzplan.php 8,3 - 9 kHz WETTERHILFENFUNKDIENST D54A ziv Wetterhilfenfunk 8,3 - 9 kHz (weather emergency service)

Update i found another one with slightly less max RPM:

There isnt 3-phase mains going into the device, but i assume is uses a 3-phase brushless motor with a driver circuit for speed control

NVIS propagation

Is a interesting topic, basically what i am looking for. Problem being is that right now i am restricted to license free bands.

27mhz can skip if the conditions are right, im guess i just find out if it works. Used some web SDR to check the CB band round here…not much going on so at least there wont be much background noise

Thank you very much for the answer! The power difference between the 0.25W Lora and the 4W FM is huge yes, thats why i kinda hoped Thor over CB would give me better range in a environment where line of sight is not given and there isnt a Mesh network in place for the LoRa.

I am trying to make a low speed text chat connection at a distance of 20-40km, with half a city between the Radios. I looked into LoRa based standalone devices like the T-Deck, but what i saw online was sobering regarding the actual functionality out in the field(besides super duper ranges in elevated line of sight).

The next idea was just geting a cheap used CB-Radio and hooking it up to AndFLmsg, would that be realistic to clear the distance of 20-40km with half a city between it?

I mean if that dosent work out there is still the non licensed sub 9khz band…