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…
ContinueAdded by Chuck aa0hw on November 20, 2020 at 3:19pm — 2 Comments
uses a remote RASPBERRY PI 4 that hosts the LINUX CW KEYBOARD from AD5DZ - RECRI KEYER - https://github.com/recri/keyer using SSH -X on windows to bring up the PI4 CW KEYBOARD on the WINDOWS 10 DESKTOP (uses REALvnc to attach the connections from the CW KEYBOARD MIDI…
ContinueAdded by Chuck aa0hw on November 1, 2020 at 5:30pm — No Comments
using all AD5DZ SDR software MODULES to capture & demodulate a QRQ CW signal heard on the VLF BAND at 10101 Hz...this video also shows one special adjustment made to a RECRI KEYER FILTER file setting to create a custom CW AUDIO BANDPASS FILTER for QRQ CW RX copy
a VLF RX ANTENNA - tuned bi-coil ferrite rod - brings in the VLF SIGNAL…
ContinueAdded by Chuck aa0hw on May 3, 2020 at 2:30pm — No Comments
Experimental Morse Code QRQ CW setup over ip to send VLF RF CW at 17Khz using the OPUS AUDIO CODEC - to a remote TRANSMIT ANTENNA located at the other OP's QTH... the other OP receives the VLF TX RF using a small FERRITE BOBBIN CORE INDUCTOR COIL antenna hooked directly to their PC Mic or Line, soundcard input
the 17Khz CW TX/RX by the…
ContinueAdded by Chuck aa0hw on April 21, 2020 at 10:00am — No Comments
the QUISK SDR APP provides several useful functions for conducting CW QSO's over ip at VLF RF(10Khz) on the iCW MUMBLE SERVER:
https://sites.google.com/site/icwoip/
https://james.ahlstrom.name/quisk/
1. QUISK has Tx/Rx RIT - you can…
ContinueAdded by Chuck aa0hw on April 16, 2020 at 10:58am — No Comments
Brief experimental setup using the AD5DZ CW KEYER, to directly send 18.200 Khz CW AUDIO to a 20 watt audio amp...from the audio amp output to a large BLUE IRON POWDER TOROID 4 to 1 balun - then to the input of a compact 21 foot long DELTA LOOP wire antenna with one leg of the delta loop connected to a series resonant capacitor(6uF)
This 4 to…
ContinueAdded by Chuck aa0hw on February 20, 2020 at 4:44pm — No Comments
this is a follow up video to the first one:
https://youtu.be/ON-tZWiCCPQ...
everything is the same in this video, except, this time we send QRQ CW at 80 wpm to test how it will sound over VLF and using SAQrx by itself - using its 300 hz wide bandpass filter - centered at 700 hz
and with…
Added by Chuck aa0hw on February 14, 2020 at 12:43pm — 1 Comment
NOTICE the DEAD ZONE in the following SCOPE view of sending a couple of 55 ms DITs... while trying to listen for how much QSK RECEIVE AUDIO is between those dits....NOTE: you will see a GAP of "NO AUDIO" from phase cancellation due to the technique that the K3 firmware uses to try and get "more" QSK audio for the QRQ OP's
the steady…
ContinueAdded by Chuck aa0hw on January 25, 2020 at 3:56pm — No Comments
this is a follow up video to this one:
https://youtu.be/JPecQqQk85Q
the K1EL K40 CW KEYER's SPEAKER AUDIO OUTPUT is hooked directly to the Ferrite Bobbin Core Inductor Coil input...an EMF PICKUP COIL is right on top of the COIL(cheap telephone recording emf pickup coil)...connect the EMF PICKUP…
ContinueAdded by Chuck aa0hw on January 20, 2020 at 3:00pm — No Comments
Added by Chuck aa0hw on January 16, 2020 at 5:22pm — No Comments
the CW NOTE on the left is using a Raised cosine edge at 6ms rise/fall time with NO bandpass filtering...the harmonics are plentiful as shown on the spec an below it
the CW NOTE On the Right is using the same Raised cosine edge at 6ms - but in addition - is passing through a simple Gstreamer CLI bandpass filter...the BPF virtually eliminates all harmonics above and below the CW PITCH…
ContinueAdded by Chuck aa0hw on January 15, 2020 at 1:00pm — No Comments
brief demo of using Windscribe's VPN service(free version) to be able to get through a public WIFI router that is blocking all ports...
ALSO at the same time, using Gstreamer TCP audio over ip, OPUS AUDIO CODEC pipelines to create a 2-WAY full duplex audio stream between the WiFi OP and another OP that is online trying to QSO with the OP using…
Added by Chuck aa0hw on November 25, 2019 at 5:02pm — No Comments
here is a brief VIDEO to demo the problem with the K3S transmit input monitor when operating AFCW transmit MODE
brief demo showing the ELECRAFT K3S transmitting QRQ CW in FULL QSK with RX AUDIO between LETTERS...AND while you are listening to the K3S input TRANSMIT audio monitor - it sounds like everything is ok and working well...even while…
ContinueAdded by Chuck aa0hw on December 11, 2018 at 8:30am — No Comments
This video demos's a RASPBERRY PI using FLdigi which is sending out a stereo signal from the pi's own analogue sound card to 2 individual audio derived cw circuits: see here: http://qrqcwnet.ning.com/forum/topics/what-circuit-for-computer
one keying circuit keys…
ContinueAdded by Chuck aa0hw on October 30, 2017 at 2:00pm — No Comments
This video demonstrates an advanced method for qrq training with MIXXX using FREE VST PLUGINS to regenerate the exact incoming cw audio tones and recreate them with a FREE software CPO called BIPPER, - filter the final audio product - for audiophile quality qrq cw morse code audio tones. As an example, an audio mp3 file was made using FABIAN's ebook2cw program and then loaded into MIXXX for playback. The unique features on MIXXX make it a versatile training tool for qrq cw training;…
ContinueAdded by Chuck aa0hw on January 16, 2014 at 8:00pm — No Comments
Improve your qrq cw copy when listening to high speed morse code on your computer with this free software method
This video will demonstrate some unique challenges and solutions, when listening to high speed qrq cw morse code audio on your computer.…
ContinueAdded by Chuck aa0hw on February 25, 2013 at 3:29pm — 1 Comment
Using the following free software, I was able to use my laptop and mouse to send iambic cw and FLdigi qrq to an internet remote controlled icom 735:
1, Fldigi…
ContinueAdded by Chuck aa0hw on January 27, 2012 at 7:00am — 1 Comment
This is a fun qrq typing high speed online free game with scoring etc...
very good for testing your qrq typing speed and discovering which of the most common English words you might need some more practice with for typing speed and typing accuracy in general
- and you just type the word, no punctuation is used on any of the words -…
ContinueAdded by Chuck aa0hw on December 31, 2011 at 8:14am — 1 Comment
A recent poll was taken on the front page of QRQcw asking the question by one of our members, Rick, VE3MFN:
"I'm wondering what the consensus is on weight adjustment as one gets over 50 wpm"
4 cw audio mp3 files were made using FLdigi with each file sending cw at 75 wpm at 5.5 ms rise/fall time using Hanning Raised Cosine edges. Each file had a small change in dash/dot ratio…
ContinueAdded by Chuck aa0hw on January 20, 2011 at 8:30am — No Comments
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