All Blog Posts (419)

NETJACK - Midi over iP on a PRIVATE ZEROtier Network - Morse Code Midi CW KEYER example demonstrated

brief demo of sending Midi CW over the internet to key midi input CW sine wave oscillator APPs; using a PRIVATE ZEROtier network where you don't have to port forward routers, but you do have to be an accepted, authorized member of the ZEROTier NETWORK that is being used more details of setting up

NETJACK from…

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Added by Chuck aa0hw on February 16, 2023 at 11:50am — No Comments

DOS QRQ CW KEYBOARD APP // CW MAESTRO \\ works better using DOSBox-X - LIVE DEMO

CW MAESTRO inside DOSBox-X seemed to work much better than using the native DOSBox app(for linux) the QRQ CW audio output was more stable using DOSBox-X(normal dosbox itself had lots of audio dropouts with the same settings) CW MAESTRO FULL VERSION by permission of CW MAESTRO creator/DEV available here for download(.7z file)…

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Added by Chuck aa0hw on February 14, 2023 at 11:21am — No Comments

Tuned Resonant CW SPEAKER - open baffle - using a 4 inch woofer laying inside an aluminum WOC Lid

brief demo of a resonant CW SPEAKER setup using an ALUMINUM WOC LiD that the XYL was going to throw away...

and a forgotten 4 inch sub-woofer i purchased from RADIO SHACK back in the late 80s...

turns out the combo performed well as a RESONANT CW SPEAKER

and was much louder in…

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Added by Chuck aa0hw on February 9, 2023 at 12:08pm — No Comments

Raspberry Pi4 CW Keyboard

Using just a Raspberry PI and the RECRI KEYER's  software CW KEYBOARD

with the Pi's own native bcm2835 headphone output

This setup is QRQ fast from TYPING on the SCREEN and hearing the CW AUDIO SIDETONE from the pi4's headphone jack   …

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Added by Chuck aa0hw on February 9, 2023 at 8:40am — 1 Comment

The Best FREE Morse code software CW Keyboard for a MAC - LiVE demo

using the CW KEYBOARD that is already loaded up on a Raspberry Pi4 on the local network using ssh -X via Xquartz for the mac https://www.xquartz.org/

SETUP

ssh -X into the pi,  bring up lxterminal,  migrate to the CW KEYER software APP FOLDER bin, by…

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Added by Chuck aa0hw on February 8, 2023 at 10:00am — No Comments

QRQ CW 'copy by ear' PRACTICE via an online RADIO STATION(mp3) and via iCW MUMBLE(OPUS) - LIVE DEMO

brief testing and comparing MP3 to OPUS from a CASTER.FM free online Radio Station setup and the iCW MUMBLE Server/client setup

a Raspberry Pi 4 is doing the transmitting to both MUMBLE INPUT and the RADIO STATION INPUT

unixCW is providing the APP to send repeating text files at different speeds and at…

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Added by Chuck aa0hw on January 26, 2023 at 1:58pm — No Comments

Christian CW OPs: use your QRQ skills for STEALTH communication with other Christian CWops in countries where Christians are persecuted

This method uses 3Khz VLF RF CW over ip that is encrypted & stealth modulated

using MicroModulation methods to encode stealth, LiVE text messaging data onto an a VLF 3kHZ AM CARRIER wave .. can't see anything, or hear anything - sounds and looks like a 'dead' carrier wave with nothing on it...

METHODS the…

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Added by Chuck aa0hw on January 18, 2023 at 1:55pm — No Comments

SonoBus + SMART PHONE - as a Morse Code, CW 'copy by ear' PRACTICE, 'audio over ip/WiFi' Receiver

demo of using an iphone as a QRQ CW SonoBus Receiver - to choose & listen to multiple CW TEXT files(up to 18 different text files) being sent by unixCW's CW program from a pi4 'audio over WiFi' Transmitter NOTE: SonoBus, in MULTI-CHANNEL input mode, can send 18 different, individual audio sources at the same time, and the iphone sonobus…

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Added by Chuck aa0hw on January 16, 2023 at 10:16am — No Comments

QRQ CW Morse Code RADIO - Python Radio Receiver - CW 'copy by ear' practice from 20 - 100 wpm

Python QRQ CW Radio Station Receiver - modified from this python script: https://github.com/irsbugs/GStreaming/blob/master/radio_gui.py

sending CW text files on continuous repeat using unixCW's CW program…

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Added by Chuck aa0hw on January 14, 2023 at 9:43am — No Comments

QRQ CW - AM Modulated @64Khz - demod by Rohde's Detector circuit, filter output through W3NQN filter

custom w3nqn QRQ CW filter

https://imgur.com/zauJdeV

https://imgur.com/fxZoPUz

Rohde's AM Detector Circuit…

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Added by Chuck aa0hw on January 5, 2023 at 1:29pm — No Comments

Raspberry Pi4 QRQ CW text file sending using unixCW's CW program set for continuous repeat - LIVE demo @ 73wpm

TERMINAL COMMAND for sending a CW TEXT file with UNiXCW/cw program (continuous REPEAT)

while true; do (./cw -d hw:0,1,0 -f ur.txt -w 73 -k 48 -t 852 -v 100); sleep 1; done

for unixcw's CW audio output - this script uses the alsa loopback snd-aloop cable(hw:0,1,0) to receive it uses alsa_in -d hw:0,0,0…

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Added by Chuck aa0hw on January 2, 2023 at 11:20am — 2 Comments

LYsdr - a GREAT Linux soundcard SDR to use for HAM RADIO - LIVE DEMO using VOICE, CW, and DOMINOex22

https://github.com/gordonjcp/lysdr demo of using LYSDR to demod 3 VLF frequencies at the same time using multiple instances of LYSDR and combing their demod'D audio outputs…

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Added by Chuck aa0hw on December 26, 2022 at 11:13am — No Comments

QRQ CW Practice using QUiSK SDR, unixCW text file sender, Gstreamer CW Router & RECRI CW Regenerator

QUiSK SDR with the help of unixCW, gSTREAMER & RECRI KEYER allows a unique way to practice your CW copy by EAR

SETUP: unixCW's CW program is sending the same text file at speeds below & just above, say...a current comfortable CW copy by ear speed... pick a text file and speed that is no longer than 10 to 15…

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Added by Chuck aa0hw on December 25, 2022 at 10:26am — No Comments

FLdigi over iP - LiVE demo sending FLdigi Morse Code Audio between 2 CWops over the internet

uses FLdigi, Gstreamer and VIRTUAL AUDIO CABLEs the virtual audio cables take the CW AUDIO OUTPUT from FLdigi and send it to the OP's soundcard(for CW sidetone monitoring @ low latency) AND sends it over iP to the other CW OP(can use any audio codec via Gstreamer)

one Gstreamer SCRIPT does it all - grabs FLdigi's…

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Added by Chuck aa0hw on December 24, 2022 at 1:39pm — No Comments

Build ur own Ham Radio Virtual ionosphere with Pi4, gstreamer, QUiSK SDR, 192kHZ sample rate sndCARD

demo of setting up a pi4 to act as an RTSP virtual ham radio ionosphere SERVER that many OPs can connect to for QSO'n or just listening... this setup uses an i/q input above and below ZERO POINT by about 80 Khz worth of RF SPECTRUM - to gather together and QSO uses the gSTREAMER wavpack codec, and a gstreamer…

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Added by Chuck aa0hw on December 17, 2022 at 2:09pm — 1 Comment

QRQ CW iphone receiver over SONOBUS via pi4 QUISK SDR/realvnc using 8 VLF signals & 8 CW text files

demo showing unixcw/CW sending 8 different CW Text files at 60 wpm to a pi4 QUISK SDR, using sonobus on the pi4 to send QUISK SDR demodulated output to the iphone sonobus// iphone using REALvnc to choose which pi4 QUISK SDR VLF SIGNAL to demod and listen to

UNIXCW CW…

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Added by Chuck aa0hw on December 17, 2022 at 10:10am — No Comments

sound card SDR Receiver, VLF band, downconverter / software MIXER - LIVE DEMO with 5 VLF CW signals

brief demo using the sound card SDR modules from RECRI KEYER to downconvert 5 VLF CW signals from 16Khz to 20Khz converted/mixed down to CW audio at 700 hertz

https://github.com/recri/keyer

Added by Chuck aa0hw on December 15, 2022 at 9:30am — No Comments

QSO CW over VLF by Gstreamer, a Raspberry PI remote VLF Transmitter & RX laptop with Ferrite antenna

brief demo showing the REMOTE Pi4 VLF TRANSMITTER setup and a laptop soundcard SDR receiver using its own FERRITE LOOPSTICK ANTENNA to pick up the VLF signal from the remote PI's transmitter's loop antenna located in the other room

soundcard SDR modules are from RECRI KEYER…

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Added by Chuck aa0hw on December 12, 2022 at 1:45pm — No Comments

QRQ CW Receive using a HIGH Q FILTER - too much ringing? elongated CW elements? - try using a DE-Qer

demo uses TRIGGER MIDI MONO as a DE-Qer

TRIGGER MIDI MONO analyzes the input volume peaks of the HIGH Q CW elements then sends out a MIDI NOTE on/off message to a software midi input CW KEYER app like RECRI KEYER - https://github.com/recri/keyer (or…

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Added by Chuck aa0hw on November 18, 2022 at 9:56am — No Comments

3CX for Morse Code OPs to qso over WEBrtc for FREE - up to 25 participants

3CX

FREE VIDEO CONFERENCING

NO TIME OR USER LIMITS

FULL DUPLEX

Easy. No downloads or accounts Simple to create, host and join a meeting. Attendees join from their browser. No app required. We never ask your attendees to create an account or give out details.…

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Added by Chuck aa0hw on November 16, 2022 at 8:27am — No Comments

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