VLF Transmitter & Receiver experiments - YouTube

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Testing different software & hardware setups for VLF, ULF, SLF, ELF and LF operations
1:47
VLF CW AM Transceiver project for MUMBLE iCW - prototype 1 - The Receiver section
By QRQcw
  • 118 views
0:57
VLF CW AM Receiver using Rohde's AM Detector circuit PLUS class D audio amp - 33.7Khz AM CW example
By QRQcw
  • 78 views
1:27
simple VLF AM Receiver using Rohde's AM Detector circuit PLUS class D audio amp - 33.7Khz AM example
By QRQcw
  • 106 views
2:05
Rohde's AM Detector 33.7Khz - DIY - AM Receiver - LIVE DEMO
By QRQcw
  • 83 views
1:44
Experimental ELF/VLF 3 FULL DUPLEX signals for Mumble - BPSK125(live text messaging) - HD VOICE - CW
By QRQcw
  • 56 views
5:44
Morse Code Practice Raspberry PI 4 Twitch LIVE stream - 25 wpm to 100 wpm: select speed by QUISK SDR
By QRQcw
  • 87 views
1:34
DIY 12Khz VLF VOICE CHAT - LYSDR SDR Receiver, Recri Keyer SDR Transmitter - Full Duplex QSO over ip
By QRQcw
  • 134 views
5:23
DIY Radio over IP - 12 individual Radio Station VLF/LF RF Signals in 1 RTSP server RF over IP stream
By QRQcw
  • 211 views
4:36
2 VLF CW signals only 100 hertz apart using ENB-CW modulation: Pi4 transmitter & laptop SDR receiver
By QRQcw
  • 60 views
3:54
Streaming 16Khz VLF RF Morse Code ENB-CW over TWITCH - LIVE demo
By QRQcw
  • 67 views
3:33
Raspberry PI 4 - 21Khz Ultrasonic ENB-CW EMF Transmitter & laptop soundcard SDR Receiver - LIVE demo
By QRQcw
  • 69 views
1:42
send OR stream QRQ CW over ip using micro-encoded CW Keying Data that looks like a player piano roll
By QRQcw
  • 62 views
2:12
2 Tone Narrow-Band CW digital mode - send & receive both CW & text messages with 1K & 2K pilot tones
By QRQcw
  • 133 views
2:27
Raspberry PI 4 ENB-CW soundcard SDR Transmitter & ENB-CW Laptop soundcard SDR Receiver 48Khz LF band
By QRQcw
  • 51 views
8:20
Raspberry PI 4 ENB-CW soundcard SDR Transmitter & ENB-CW Laptop soundcard SDR Receiver - on VLF band
By QRQcw
  • 78 views
2:16
Experimental Transmit/Receive ENB-CW keying mode/EXTREME NARROW BAND-CW/micro-modulation VLF carrier
By QRQcw
  • 50 views
8:21
CW keying data attoWatt modulation of a 12Khz VLF RF carrier: ZamGate DECODER converts it back to CW
By QRQcw
  • 54 views
0:49
QRQ CW over 100 WPM - compare A1 mode CW KEYING spectrum bandwidth to modified A2 mode - LIVE demo
By QRQcw
  • 83 views
6:21
micro modulating VLF CARRIERs to embed CW Keying Data & send it over IP to other CWops on Mumble/iCW
By QRQcw
  • 68 views
5:06
experimental Morse Code CW Braille Encoder/Decoder: Micro Modulate CW Keying data onto a VLF Carrier
By QRQcw
  • 52 views
5:02
send Encrypted, secure, text message(s), live or mp3, micro modulating a 12Khz VLF RF AM carrier
By QRQcw
  • 65 views
1:23
encoding & encrypting text message QRQ CW Morse Code KEYING DATA onto & into a 60 hertz audio signal
By QRQcw
  • 106 views
4:24
THE MATRIX - Morse Code Version - 10 CW signals in one DATA STREAM - LIVE demo using LYSDR to decode
By QRQcw
  • 74 views
2:49
6Khz VLF RF Pilot Tone with Real Time encoded & embedded digital CW Element DATA - over DISCORD APP
By QRQcw
  • 66 views
9:49
Morse Code Audio Over Mumble Voice Chat: testing new CW MODE to see if it has any advantages over A1
By QRQcw
  • 201 views
1:49
Experimental new Morse Code CW MODE - Pilot Tone with inaudible embedded CW Keying Data - LIVE demo
By QRQcw
  • 100 views
1:20
Receiving QRQ CW over the SLF BAND: LIVE demo: 50 hertz CW sent at 50 wpm: RX converts 50hz to 780hz
By QRQcw
  • 49 views
6:33
iphone mumble input: 19Khz AM VLF CW ferrite bobbin core induction coil underneath iphone microphone
By QRQcw
  • 57 views
3:43
18Khz AM-SSB(lsb) VLF RF CW over Mumble Voice Chat using soundcard SDR - dual conversion - LIVE demo
By QRQcw
  • 43 views
1:49
QSO ASSIST homebrew setup for text message over IP to raspberry pi & iphone uses BPSK63 digital mode
By QRQcw
  • 21 views
2:23
VLF tuned Ferrite Rod Loopstick Receive Antenna for a soundcard SDR Mic input jack - LIVE CW RX demo
By QRQcw
  • 366 views
5:08
30Khz CW Transmitter using a Bipolar Tesla Coil Ferrite Core Antenna that has tuned resonance @30Khz
By QRQcw
  • 372 views
5:16
using a resonant tuned FERRITE ROD loopstick antenna to audio filter & listen to CW using headphones
By QRQcw
  • 181 views
3:12
passive CW AUDIO BANDPass filter using 3 series/parallel tuned Ferrite Rod Loopstick Antenna stages
By QRQcw
  • 191 views
3:11
Remote RIG Audio - ferrite core transmit antenna positioned in the basement floor underneath the OP
By QRQcw
  • 46 views
2:32
DIY IEM(in ear monitor) using an ELF/VLF transmitter & a ferrite rod ELF/VLF near field coil antenna
By QRQcw
  • 271 views
6:14
7.1 wireless powered speakers using VLF/LF RF Transmitter: multiple Raspberry PI VLF/LF RF Receivers
By QRQcw
  • 33 views
0:50
Ferrite Rod adjusts the audio volume of an ELF/VLF(audio EMF) near field passive headphone receiver
By QRQcw
  • 57 views
15:37
QRQ CW COPY PRACTICE - from a DIY Submarine ELF CW 76 hertz ELF RF SDR Transmitter - 76 wpm
By QRQcw
  • 95 views
1:40
Submarine 76 hertz ELF CW demo - diy Xmitter/Rcvr using Ferrite rod Transmit & Receive antennas
By QRQcw
  • 365 views
2:49
Media PC audio to Laptop headphones across the room by ELF VLF RF - audio amp to Ferrite rod antenna
By QRQcw
  • 75 views
1:00
HAMFEST HELMET VLF CW COMMUNICATOR - use Ferrite Rod loopstick Transmit Antenna on top of the Helmet
By QRQcw
  • 157 views
1:35
Communicate directly to TeleCoils using this portable battery powered induction hearing loop mic/amp
By QRQcw
  • 92 views
10:51
QSO CW over IP(no port forwarding) uses a ZEROtier VLAN network with VBAN_EMITTER with jack support
By QRQcw
  • 80 views
2:04
VBAN_EMITTER now has jack support - Morse Code QRQ CW example - CW to an iPhone using VBAN receptor
By QRQcw
  • 129 views
4:07
Raspberry Pi 4 - remote VLF RF QRQ CW Transmitter - LIVE Demo using the Ultragrid VLF RF over IP APP
By QRQcw
  • 71 views
2:10
VLF Ferrite Rod Antenna(Bipolar Tesla Coil with large Ferrite core) uses Mic Jack input - CW example
By QRQcw
  • 537 views
4:03
Ferrite Rods passive ELF headphone CW Receiver - 767hz
By QRQcw
  • 77 views
3:29
DIY Wireless Headphones - Media Center Demo - uses an ELF/VLF RF Transmitter and a passive receiver
By QRQcw
  • 112 views
3:47
700hz ELF passive EMF CW RECEIVER - using a double tuned Ferrite Rod/Bobbin Core antenna
By QRQcw
  • 119 views
4:27
CW 700hz ELF 30 watt CW TRANSMITTER using large FERRITE ROD Core Loopstick 1 layer Wire Coil Antenna
By QRQcw
  • 224 views
1:07
Large Ferrite Rod Core TABLE TOP Transmit Vertical Loopstick Antenna for ELF/VLF(audio) - 30 watts
By QRQcw
  • 475 views
9:15
Build your own Induction Loop Desktop Audio Transmitter using a large Ferrite Rod Loopstick Antenna
By QRQcw
  • 250 views
4:16
Raspberry PI 4 ELF/VLF 12hz to 12Khz HiFi wideband audio EMF Receiver
By QRQcw
  • 314 views
9:06
Multi OP CW over IP CONFERENCE QSO setup using a VORBIS encoded 12 channel RTSP SERVER/client setup
By QRQcw
  • 57 views
5:27
The 13Khz Podcast - in i/q STEREO - 2nd test using an HD AUDIO voice file - use an SDR to listen
By QRQcw
  • 54 views
3:25
Raspberry PI 4 - 13Khz VLF RF SDR Receiver - VLF over WiFi using a 5G Router: LIVE demo with bcm2835
By QRQcw
  • 119 views
2:55
How To use CW REGENERATION to demodulate the Morse Code VLF signals in YouTube videos
By QRQcw
  • 109 views
1:29:37
The Bible in Morse Code Project - The Book of Philippians - (11 individual signals from 25 - 75 wpm)
By QRQcw
  • 158 views
1:31
The 13Khz Podcast - IN STEREO - first test with a Hi-Res stereo FLAC audio file - use SDRs to listen
By QRQcw
  • 46 views
6:26
iPhone ZeroTier VLC RPiPlay soundcard SDR VLF RF MT63-2KL FLdigi text message Transmitter & Receiver
By QRQcw
  • 66 views
2:57
AM *ESSB* 13Khz VLF RF Transmitter & Receiver - with 10Khz Hi-Fi wideband audio using soundcard SDR
By QRQcw
  • 79 views
2:22
Raspberry PI 4, 175Khz LF RF over IP Lowfer Band soundcard SDR AM Transmitter & Receiver - LIVE demo
By QRQcw
  • 202 views
2:57
DIY Church Assisted Listening System: FREE software tools to evaluate the EMF fields of the building
By QRQcw
  • 51 views
2:16
BAUDLINE & LYSDR APPs to view & listen to the VLF/LF signals on a soundcard SDR FERRITE CORE ANTENNA
By QRQcw
  • 109 views
1:42
Large Ferrite Rod Core Loopstick AM Transmit Antenna for 32Khz - LIVE demo
By QRQcw
  • 459 views
2:57
Remote Raspberry PI 4 SDR sending its antenna VLF RF signal back to a laptop SDR over WIFI 5G ROUTER
By QRQcw
  • 121 views
4:13
Testing an Experimental 83Khz SDR AM Transmitter & Receiver - for a Church Assisted Listening System
By QRQcw
  • 28 views
38:02
71Khz AM Transmitter & Receiver for a Church Assisted Listening System Induction Hearing Loop setup
By QRQcw
  • 31 views
5:44
Church Assisted Listening PC soundcard SDR 80Khz Hearing Loop AM Transmitter with multiple DSP apps
By QRQcw
  • 47 views
5:07
DIY Build your own IAMBIC TOUCH PADDLES CW KEYER using all free software and junk box hardware parts
By QRQcw
  • 430 views
1:35
QRQ CW @77.5 WPM on the LF band @77.5Khz using a homemade DCF77 Hi-Q Ferrite Bobbin Core RX Antenna
By QRQcw
  • 193 views
1:13
Tuned DCF77 homemade Ferrite Antenna: for Church Assisted Listening Hearing Loop 77.5Khz AM Receiver
By QRQcw
  • 636 views
4:11
Experimental IN EAR MONITOR(IEM) use a Raspberry PI 4 SDR Receiver & a PC sound card SDR Transmitter
By QRQcw
  • 210 views
1:53
Sound Card Schumann Resonance(7.83 hertz) Generator - LIVE DEMO
By QRQcw
  • 1.8K views
2:58
ONE 12Khz SSB(upper sideband) VLF RF signal - actually has TWO individual audio modulation sources
By QRQcw
  • 56 views
2:27
HiFi Stereo SSB(Single Sideband) demo using i q quadrature phasing - LIVE demo with the LYSDR app
By QRQcw
  • 118 views
12:34
iphone CW Keyer for Mumble input via a FERRITE BOBBIN CORE INDUCTOR emf signal underneath iphone MIC
By QRQcw
  • 86 views
55:47
DIY Assisted Listening System 32Khz AM modulation induction hearing loop transmitter & receiver test
By QRQcw
  • 43 views
3:56
Listen to this HiFi Audio 12Khz wide Experimental Assisted Listening induction hearing loop Receiver
By QRQcw
  • 28 views
2:08
Suppressing unwanted spurious EMF signals from being picked up by a hearing induction loop receiver
By QRQcw
  • 41 views
3:02
Raspberry PI 4 - BBC RADIO PLAYER - ALL 5 Channels - uses Quisk SDR to select any of the 5 stations
By QRQcw
  • 173 views
2:13
testing the Rhode's AM Detector circuit to see if can DEmOd AM-SSB from a soundcard SDR - LIVE demo
By QRQcw
  • 40 views
1:12
Quisk SDR, a soundcard SDR, picks up all 5 of the BBC RADIO CHANNELS from their LIVE STREAMs
By QRQcw
  • 206 views
4:35
QRQ CW over 100 wpm on the VLF Band at 23Khz - sound card SDR VLF Transmitter & Reciever - LIVE demo
By QRQcw
  • 109 views
8:43
Homemade Assisted Listening System - AM-SSB @14Khz - with tuned resonant transmit & receive antennas
By QRQcw
  • 29 views
1:39
testing surplus AM ferrite loopstick antenna for an Assisted Listening Hearing Loop Receiver Antenna
By QRQcw
  • 55 views
1:45
Submarine 82hz ELF soundcard SDR, QRQ CW, QRP, Transmitter & Receiver - test run at 82 wpm
By QRQcw
  • 912 views
5:14
Submarine 82hz ELF soundcard SDR Morse Code QRP Transmitter & Receiver - using Ferrite Core Antennas
By QRQcw
  • 358 views
13:08
Submarine 82hz ELF soundcard SDR QPSK31 QRP FLdigi Transmitter & Receiver: use Ferrite Core Antennas
By QRQcw
  • 205 views
1:26
Radio RF over IP - use live stream from BBC AM 198Khz Longwave to modulate an SDR 198Khz Transmitter
By QRQcw
  • 93 views
5:33
Scanning the VLF BAND with the soundcard SDR - "LYSDR" - a Simple Software-defined radio - LIVE Demo
By QRQcw
  • 157 views
11:57
42 different CW SIGNALs in 1 STREAM(15 wpm to 101 wpm) - COPY BY EAR practice using QUISK SDR - DEMO
By QRQcw
  • 53 views
5:25
Lysdr - a Simple Software-defined radio - used as an induction hearing loop 14Khz USB HiFi Receiver
By QRQcw
  • 94 views
4:12
Lysdr - a Simple Software-defined radio - LIVE DEMO - ESSB USB Receiver test at 9Khz audio bandwidth
By QRQcw
  • 115 views
4:07
A Virtual CW Server with room for many CWops to QSO - using SDR# SHARP & any audio conferencing APP
By QRQcw
  • 104 views
50:52
2021 Interview with John MacArthur - REMIX using EQ, EMPHASIS, AGC & ambient guitar background music
By QRQcw
  • 31 views
5:14
Listen to this experimental 64Khz AM induction hearing loop Transmitter & Receiver: Live Stream test
By QRQcw
  • 47 views
29:41
Ferrite Rod Loopstick Antenna test - for a Church Assisted Listening Induction Hearing Loop Receiver
By QRQcw
  • 63 views
1:46
homebrew QRQ CW 7 Transistor TRF Receiver receiving an AM CW Signal on the LF band at 75Khz @75 wpm
By QRQcw
  • 93 views