Vilius
https://www.youtube.com/live/GJ8cY0s7sxw
#SAQ Grimeton #VLF Transmitter
17.2 kHz
Seniausias veikiantis elektromechaninis siųstuvas, kurio signalą teoriškai galima priimti naudojant kompiuterio garso korta ir iiilgą laidą.
UN Day 2025 SAQ Grimeton VLF transmitter - 14:00 UTC

YouTube
Oct 24 at 1:10pmWeb
Show threadViliusOct 24

Pasirodo neblogas imtuvas gavosi.
SAQ 17.2 kHz
3 alpha beacons 11.905 kHz, 12.649 kHz, 14.9 kHz;
FSK signalas ~21.1 kHz
RDL 18.2 kHz

Software SDR++
Receiver: Cheap USB audio interface su MIC In
Antenna: 20m Dipole (2 laidai po 5 metrus)

#VLF #SoundCard #SDR

Show threadViliusOct 24
Show threadJúliaOct 25
@vilisas What?
Show threadViliusOct 25
@_juliavithoria Using audio card as very low frequency radio receiver to receive signals from a century old electromechanical VLF transmitter.
Show threadJúliaOct 25
@vilisas Brilliant 😍