All Blog Posts Tagged 'QRQcw' (93)

for the PYTHON CW OPs out there - to QSO online with each other - here is a homebrew full duplex, Full Mesh Networking setup

modified python script for RECEIVING every connecting CW OP

to the FULL MESH, ZEROTIER, PRIVATE IP network is from:

NOTE: other mods…


Added by Chuck aa0hw on October 16, 2021 at 11:52am — No Comments

Send QRQ CW AUDIO OVER IP with WebCall Audiophile Telephony - WebCall offers free WebRTC telephony

this video is a followup video from the 1st testing of WebCall for Morse Code Audio QSO here -

2nd test of WebCall to see how well this FREE WebRTC service/APP will handle



Added by Chuck aa0hw on October 16, 2021 at 10:17am — No Comments

YPLog QRQ CW Keyboard on Linux(W.I.N.E.) - special method to convert YPLog to Raised Cosine CW edges

PulseAudio is not being used, only the DEFAULT ALSA Sound Card...

the default alsa sound card is an ALSA LOOPBACK VIRTUAL SOUND CARD this Zalsa Command brings the YPLog CW AUDIO into the JACK AUDIO CONNECTION BAY for processing through the alsa loopback virtual cable:

jack_load -w -a zalsa_in -i "-d…


Added by Chuck aa0hw on October 9, 2021 at 8:07pm — No Comments

QRQ CW Keyboard in a Browser & use this Keyboard to have a QRQ CW QSO over IP with another QRQ CW OP

The transmit & receive OPUS AUDIO over IP PYTHON scripts to QSO CW are modified from the original PYTHON SCRIPTS here:…


Added by Chuck aa0hw on September 6, 2021 at 8:40pm — No Comments

if you use a PC for QRQ CW operations with your RIG, please show us the desktop APPs you are using...

Here is mine:   (from this morning's QSO with  w4dbv)

the SPEC GRAPH and SCOPE are showing Brian's signals on my k3s receiver 

the FLrig APP controls the rig from my remote position in the living room...…


Added by Chuck aa0hw on July 21, 2021 at 8:16am — No Comments

Hasak CW Keyer: using a QRQ CW Keyboard APP with an audio derived keying circuit that keys the Hasak

test to see how well an audio derived cw keying circuit, like one of these:

can "key" the HASAK CW KEYER's straight key pins...and allow a software CW KEYBOARD…


Added by Chuck aa0hw on July 20, 2021 at 8:43pm — No Comments

Submarine 82hz ELF soundcard SDR, QRQ CW, QRP, Transmitter & Receiver - test run at 82 wpm


CW KEYBOARD sends 82 hertz CW out one of the sound card's line output jacks to a class D 30 watt audio amp... the audio amp output is connected to a FERRITE BOBBIN CORE INDUCTOR COIL (@ 1.8mH) - the output of the 30W audio amp 1st goes to a POWER TOROID TRANSFORMER with multiple windings and tested to…


Added by Chuck aa0hw on July 2, 2021 at 11:02am — No Comments

homebrew QRQ CW 7 Transistor TRF Receiver receiving an AM CW Signal on the LF band at 75Khz @75 wpm

75Khz soundcard SDR QRQ CW TRANSMITTER is built from the RECRI KEYER CW Keyboard - (the AD5DZ CW Keyboard can send directly at 75Khz if your sound card sample rate is set to at least 192Khz)

- CW KBD terminal…


Added by Chuck aa0hw on June 7, 2021 at 1:20pm — No Comments

The Versatility of the AD5DZ CW Keyboard for QRQ CW copy by ear Practice

brief demo of having the AD5DZ CW Keyboard send a text file at 71wpm and then adjusting the KB's many settings to fine tune how the CW sounds for best COPY BY EAR during a QRQ CW training session

Added by Chuck aa0hw on April 13, 2021 at 8:00am — 1 Comment

VLF RF over IP IQ CW Transmitter & Receiver: LIVE demo using Gstreamer & the Recri Keyer SDR modules

Gstreamer is for all OS'es MAC, LINUX, WINDOWS 10, Raspberry Pi

Recri Keyer SDR Modules & CW Keyer, CW Keyboard…


Added by Chuck aa0hw on March 29, 2021 at 2:23pm — 1 Comment

Raspberry PI remote VLF RF over IP Rcvr::RE-Transmitter - Local PC SDR VLF Receiver - QRQ CW example

experimental setup to QSO QRQ CW at 18Khz VLF RF over ip - using a PEER to PEER Gstreamer PIPELINE TCP/ip setup and a Raspberry PI as a REMOTE VLF RX/ RE-TRANSMITTER

a PI2B is setup to RECEIVE another OP's VLF RF over IP transmission(CW at 18Khz) using a Gstreamer rtp TCP/ip PIPELINE - using the WAVPACK CODEC...the PI2b…


Added by Chuck aa0hw on February 1, 2021 at 11:45am — 1 Comment

sending QRQ CW over IP over MIDI using ASEQNET TCP/IP - 80 wpm test - Linux Laptop to a Raspberry PI

test to see how stable the CW TIMING is at QRQ CW speed * 80 wpm * when using ASEQNET server/CLIENT setup midi over tcp/ip

a MIDI CW KEYBOARD is used as the CW MIDI…


Added by Chuck aa0hw on January 30, 2021 at 3:19pm — No Comments

Wireless CW Keyer - 40 khz LF Band TX/RX - using 2 High Q Ferrite Bobbin Core Inductor Coil Antennas

wireless transmission from the CW KEYER - keying a 555 at 40 Khz - to a wireless LF RF BAND software receiver - demod'N the 40 Khz CW Keyer LF BAND transmitter's CW

the TX and RX antenna are using a high Q , series/parallel resonated FERRITE BOBBIN CORE INDUCTOR COIL - @2mH each - series and parallel resonating capacitors…


Added by Chuck aa0hw on November 24, 2020 at 3:58pm — 1 Comment

CW Copy By Ear Practice - 22 separate signals from 20 wpm to 90 wpm - use your SDR APP to pick which one

22 individual CW software KEYBOARDs are sending a CW text file from 500 hertz up to 11Khz

separated individually by 500 hertz from one signal to another

to pick a CW SPEED/signal that you would like to copy by ear - use your SDR

- here is a quick example of doing that here with a…


Added by Chuck aa0hw on November 20, 2020 at 3:19pm — 2 Comments

classic R-C exponential envelope VS Raised Cosine for QRQ CW - Listen and Vote - which do you prefer

60 wpm test - classic R-C exponential envelope VS Raised Cosine - for copying by ear - which do you prefer ?

NOTE: to get the RAISED COSINE edges from YPlog, its RISE/FALL time was set to zero and sent through this simple Gstreamer CW AUDIO BANDPASS filter…


Added by Chuck aa0hw on November 18, 2020 at 11:00am — No Comments

The QRQ CW RE-Keyer System - a harsh square wave IN - pure sine wave OUT - with Raised Cosine edges

demo of taking the harsh square wave output of any kind of keyed CPO or CW Keyer's audio output - and RE-KEYING it exactly but transforming it to a pure sine wave CW NOTE with Raised Cosine edges (only takes 6 milliseconds from start to finish) uses ZAMGATE in SIDECHAIN MODE which has a pure sine wave TONE GENERATOR connected to Zamgate port…


Added by Chuck aa0hw on October 4, 2020 at 8:00pm — 8 Comments

QRQ CW over ip using Nelly Moser Audio Codec - real-time, low bitrate, low latency encoding/decoding

demo of using the Gstreamer NellyMoser encoder/decoder

for sending Morse Code Audio over ip with Gstreamer scripts


GST_DEBUG=3 gst-launch-1.0 -v jackaudiosrc ! "audio/x-raw,channels=1" ! audioconvert ! avenc_nellymoser ! udpsink host=(ip address of rx)…


Added by Chuck aa0hw on September 22, 2020 at 3:00pm — No Comments

QRQ CW Keyboard for Windows 10 - using the Music Language "ChucK" - demo sending CW to Mumble INPUT

brief demo of using a chucK .ck file, "" for making a QRQ CW Morse Code Keyboard APP - for sending CW to the Mumble INput on iCW…


Added by Chuck aa0hw on September 12, 2020 at 11:24am — No Comments

Morse Code Copy by Ear Practice from YouTube CW videos - use QUISK SDR, Gate & BP filter - LIVE demo

Morse Code Practice when listening to a YouTube CW video (LINUX version) on Linux, using JACK AUDIO CONNECTION KIT, with the Pulse-jack modules, using QUISK SDR to select which CW SPEED from the the multiple CW signals that are playing on the video, which one you would like listen to...etc.. hitting the YOUTUBE SHORTCUTS for REVIEW to repeat…


Added by Chuck aa0hw on September 2, 2020 at 12:00pm — No Comments

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