Chuck aa0hw's Blog – January 2023 Archive (6)

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…


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 secret…


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…


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:

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


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

Rohde's AM Detector Circuit…


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…


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

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