December 2022 Blog Posts (7)

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


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 minutes…


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…


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…


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



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

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…


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

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