All Blog Posts (154)

QRQ CW TRANSMIT afcw mode - clean up harmonic distortion before transmitting using the FILTA plugin

Brief demo of using the FILTA LV2 plugin to virtually eliminate all harmonic distortion from QRQ CW edge noise, before transmitting in AFCW MODE

http://openavproductions.com/doc/artyfx.html

Added by Chuck aa0hw on August 17, 2019 at 8:17am — No Comments

YPLog CW Keyboard - QRQ CW over the internet test using Gstreamer's OPUS codec with CW audio bandpass filtering

this is a follow up test to the previous video demoN the Gstreamer PIPELINE code for a CW AUDIO BANDPASS filter.

https://youtu.be/F6mwluqjlIM

In this video...not only is the previous pipeline used with its CWa audio bandpass code so you can hear your own YPLog CW KEYBOARD sidetone in near zero…

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Added by Chuck aa0hw on August 15, 2019 at 3:00pm — No Comments

YPLog CW Keyboard on Windows 10 - better CW audio output quality using CW Regeneration - LIVE DEMO

Brief demo showing the original audio output waveshape and sound spectrum output from YPLog's own audio engine...and then taking that original YPLog audio output from this CW Keyboard and Regenerating it to help improve the YPLog CW NOTE waveshape, edges, and audio spectrum.

NOTE: on video, the first text copied /pasted in yplog was supposed to…

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Added by Chuck aa0hw on August 8, 2019 at 10:41am — No Comments

Teensy LC board - The AD5DZ CW Keyer - K1EL K40 keys the TEENSY midi input - QRQ CW test at 150 wpm

test to see how accurate the MIDI INPUT keying would be on the TEENSY BOARD, TEENSY pins 4 & 5, being keyed by an external CW KEYER's RIG KEYING OUTPUT jack(K1EL K40 - in this example) using the AD5DZ software CW KEYER Teensy MidiKeyer code

Extreme QRQ CW speed test at 150 wpm from the K1EL K40 CW KEYER - keying together TEENSY PINS 4…

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Added by Chuck aa0hw on August 2, 2019 at 3:25pm — No Comments

YPLog QRQ CW Keyboard sending CW on Windows 10 using VoiceMeeter Potatoe - iCW example

YPLog is known as one of the most versatile and adjustable QRQ CW Keyer programs of all time...and this video demo's it working well on Windows 10 - to send CW to the Mumble Voice Chat input on iCW

https://sites.google.com/site/icwoip/

using the new VOICEMEETER POTATOE(VMP) windows…

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Added by Chuck aa0hw on July 4, 2019 at 9:32am — No Comments

QRQ CW Sidetone input for Mumble Voice Chat using MFJ-451 CW Keyboard & a telephone pickup coil

This is a follow up to the previous video using a CW KEYER:

https://youtu.be/4xXtQK57ssM

in this video, QRQ CW from an MFJ-451 CW KEYBOARD is utilized as the example

most of the modern PCs & Laptops on Windows 10 - do not have DIRECT audio INPUT MONITORING available...this video demoS…

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Added by Chuck aa0hw on June 30, 2019 at 10:23am — No Comments

QRQ CW audio & webRTC - issues and solutions for getting GREAT CW AUDIO QSOs over the internet

webRTC usually comes stock with several audio processing engines in place .... like AGC, NOISE FILTERING, ECHO CANCELLATION which all of them will destroy how QRQ CW sounds over webRTC's OPUS AUDIO CODEC audo processing engines...

used in this example is webRTC from JITSI MEET:…

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Added by Chuck aa0hw on June 14, 2019 at 12:56pm — No Comments

What QRQ CW sounds like at 75 wpm on a Tuned Radio Frequency(TRF) Receiver

Brief demo of using this TRF RECEIVER circuit(LINKED BELOW) to monitor the RIG's CW TRANSMIT - RF NEAR field - of my RIG's antenna on 80 meters

setup to listen to your rig's CW, using the RIG's antenna's NEAR FIELD RF EM - picked up by a TRF receiver's FERRITE ROD antenna - BFO'd by a simple VFO circuit

TRF Transmitter monitor…

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Added by Chuck aa0hw on June 2, 2019 at 8:57am — No Comments

Keying QRQ with the AD5DZ CW Keyboard - adjust rig & kb settings while listening to a TRF receiver

demo of using a 2nd receiver, a simple TRF receiver, to adjust your RIG and your KEYBOARD settings, to make sure you are sending cw just like you want...create your own custom CW NOTE with its own type of raised cosine edge, its own weight, rise/fall time... etc.. by listening in real time to this TRF Receiver

TRF Transmitter monitor…

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Added by Chuck aa0hw on May 27, 2019 at 11:30am — No Comments

Elecraft K3S - Keying QRQ CW - A1 mode VERSES A2 mode - LIVE DEMO

Brief demo of keying QRQ CW on the ELECRAFT K3S using A1 mode and A2 mode(AFCW) at 75 wpm to show the CW bandwidth spectrum and CW waveshape differences

A1 MODE = default way to key CW on the K3S , the K3S uses the typical RAISED COSINE at 8 ms rise/fall time and cannot be changed

A2 MODE is done by using the AD5DZ software CW…

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Added by Chuck aa0hw on March 27, 2019 at 9:55am — No Comments

QRQ CW wearable speaker - using a flat panel speaker and the CW AUDIO CANNON

one of the challenges when using a speaker for "copy by ear" listening to QRQ CW audio tones, is that the pure sine cw audio tones bounce off the walls, floor and ceiling of the room you are in and can cause all kinds of weird effects...this experimental combo of using a surplus, 5 buck, 4 ohm, flat panel speaker and the CW AUDIO CANNON…

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Added by Chuck aa0hw on March 9, 2019 at 7:02am — 1 Comment

QRQ CW Keyboard computer interface - using the Peterson Chromatic Tuner 320 & a FET optoisolator

this is a follow up video to the first two videos about using a PETERSON CHROMATIC TUNER 320 as a COMPUTER based CPO CODE PRACTICE OSCILLATOR that you can key, in with STRAIGHT KEY, IAMBIC PADDLES and a CW KEYBOARD

this video demos using an MFJ 451 CW KEYBOARD for QRQ CW sending using the same setup - a PETERSON CHROMATIC TUNER 320 and a FET…

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Added by Chuck aa0hw on February 8, 2019 at 2:10pm — No Comments

turn an OLD 1 cpu LAPTOP into a high performance QRQ CW KEYBOARD KEYER for the ELECRAFT K3S

this video demo's using an old 1 CPU laptop as an AFCW mode, QRQ CW KEYBOARD KEYER for an ELECRAFT K3S by using the K3S USB SOUND CARD and AFCW MODE, for keying QRQ CW with the AD5DZ software CW KEYBOARD into the K3S USB SOUND CARD's LINE INPUT...the K3S VOICE VOX CIRCUIT menu setting is "ON"

the old laptop is using the latest release of…

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Added by Chuck aa0hw on January 3, 2019 at 12:57pm — No Comments

Remote Rig Operations with the Elecraft K3S - using just its USB PORT and a Raspberry PI

LIVE DEMO of remote rig operations for CW using a software CW KEYBOARD, PADDLES and a STRAIGHT KEY at the remote site, as well as VOICE from the REMOTE LOCATION....

The ELECRAFT K3S has its own USB SOUND CARD, it will be used for AUDIO OVER IP and SERIAL COMMANDS over IP

to send and receive audio between the RIG and the REMOTE OP

and…

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Added by Chuck aa0hw on December 27, 2018 at 12:00pm — No Comments

QRQ CW Transmit Audio Filtering - to reduce drastically your RIG from transmitting RF CW EDGE NOISE Harmonics

Even at 8.3 ms RISE and FALL time, as was used in this test setup,  which is even more than the usual COMMERCIAL RIG's  RAISED COSINE WAVE SHAPE, the amount of CW EDGE NOISE harmonic energy that you will still transmit above and below the actual CW PITCH, when sending at QRQ CW - say at 90 wpm,  is shown here in this Spectrum Analyzer view below:…

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Added by Chuck aa0hw on December 23, 2018 at 8:30am — No Comments

QRQ CW qso'N over Gstreamer - Morse Code "audio OVER ip" using the FLAC Audio Codec

brief demo of what QRQ CW morse code audio tones sound like using the FLAC AUDIO CODEC on Gstreamer Pipelines

NOTE: the QRQ CW AUDIO you are hearing, if what the FLAC encoded CW AUDIO sounds like after decoding it finally on the LAPTOP(Lubuntu 18.04)

the QRQ CW AUDIO stream starts on the LAPTOP goes to the PI over wired Ethernet,…

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Added by Chuck aa0hw on December 18, 2018 at 11:00am — 1 Comment

QRQ CW over the OGG VORBIS audio codec - LIVE DEMO using Gstreamer TCP "audio OVER ip" scripts

test by sending a QRQ CW test file from TOM's W4BQF famous article:

https://sites.google.com/site/tomw4bqf/copyingcwover70wpm

software CW KEYBOARD by AD5DZ:

https://youtu.be/l8wKVnA4oGc

RASPBERY PI…

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Added by Chuck aa0hw on December 12, 2018 at 10:07am — No Comments

Don't TRUST the ELECRAFT K3S transmit input monitor to accurately represent what is transmitted

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…

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Added by Chuck aa0hw on December 11, 2018 at 8:30am — No Comments

QSO QRQ CW with a friend(s) using Gstreamer - send along a PICTURE of yourself with your QRQcw audio

     in HONOR of the late GREAT SK -   WILD BILL -   KB9XE   

demo of this - honoring the late great QRQcw OP

"WILD BILL", KB9XE

here are the Gstreamer scripts used for this example:

SEND a jpeg picture to…

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Added by Chuck aa0hw on November 13, 2018 at 10:00am — 5 Comments

Keying CW on the ELECRAFT K3S at 75 wpm and getting FULL QSK HF RECEIVE AUDIO between letters

Here is a video demo'N an experimental setup to key an ELECRAFT K3S at 75 wpm(FULL FAST QSK) so you are able to hear background HF RECEIVE audio between letters 

a test run using a setup using all LINUX FREE SOFTWARE to run REMOTE RIG OPERATIONS for QRQ CW at 75 wpm...trying to achieve good FULL QSK with RECEIVE HF AUDIO between letters at…

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Added by Chuck aa0hw on November 2, 2018 at 1:31pm — 1 Comment

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