All Blog Posts (134)

Don't let HF STATIC get in the way of your QRQ CW copy - use the NOISE-REPELLENT plugin to reduce or eliminate HF static

brief LIVE demo on 40 meters RX - of using the Noise-repellent LV2 PLUGIN to lower(or even virtually eliminate) the HF Background audio static while listening to a CW SIGNAL

(this plugin works well on VOICE too)



https://github.com/lucianodato/noise-repellent…

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Added by Chuck aa0hw on September 18, 2018 at 8:48am — No Comments

Streaming QRQ CW practice files from FLdigi - using the OBS desktop broadcaster and the TWITCH STREAMING service

This video is a short demo of a first test trying to broadcast 5 FLdigi's sending at 5 different qrq speeds...where you can choose which FLdigi//speed you want to listen to - right from your browser listening to the TWITCH QRQcw CHANNEL.

a test to transmit and receive 5 individual channels of audio to AND from the TWITCH Streaming server -…

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Added by Chuck aa0hw on August 15, 2018 at 4:20pm — No Comments

ATTENTION: all QRQcw OPs looking for an online qrq cw qso - we have a new iCW server devoted to QRQ CW operations

iCW now has a new PRO MUMBLE SERVER dedicated for QSO'n QRQcw over the internet

It is located in Denver, Colorado

Please see this iCW website for more information: …

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Added by Chuck aa0hw on August 10, 2018 at 4:30pm — 1 Comment

QRQ CW audio tones over Gstreamer's AUDIO PIPELINES - 16 bit audio VS 24 bit audio - does 24 bit audio make any difference for QRQcw COPY by ear ?

brief test creating 2 Gstreamer AUDIO PIPELINE LOOPBACKS from a Linux Laptop TO a RASPBERRY PI 2b - over the LAN - going through routers and switches...(both using Jack Audio Connection Kit)

one PIPELINE using rtpL16***

and the other PIPELINE using rtpL24***

to compare Gstreamer's rtpL16pay and rtpL24pay RTP AUDIO PAYLOADER…

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Added by Chuck aa0hw on May 26, 2018 at 9:30am — No Comments

Created my iCW "Station"

After bringing together EhoCW, VoiceMeeter Banana and Mumble, I built an interface for my paddles using the following:

1 - Sewell USB-Serial Adapter (I had this on hand, a similar one is available on Amazon)

1 - 3.5mm Stereo Female Terminal Block panel mount connector…

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Added by Mark Tosiello on May 22, 2018 at 10:07pm — 11 Comments

Looks like TOM, W4BQF was right about switching to DVORAK for QRQ CW sending on a keyboard - 150 wpm typing example

TOM's article about his work with the DVORAK keyboard for QRQ CW TYPING

  https://www.eham.net/ehamforum/smf/index.php?topic=81139.10;wap2

HERE IS SOMEONE USING a DVORAK KEYBOARD to type 150 wpm…

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Added by Chuck aa0hw on May 14, 2018 at 6:44am — No Comments

QRQ'n CW on HF remotely in the QTH with a LAPTOP to a RASPBERRY PI - advanced setup for CW Keyboard, Paddles, & Straight Key

this is an advanced setup for remote control of an ELECRAFT K3S over ip on the LOCAL AREA NETWORK - a LINUX LAPTOP to the Rig's Raspberry PI's computer

AUDIO OVER IP: over the local LAN with routers and switches :

zita-njbridge is used to provide audio for RECEIVE AND TRANSMIT…

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Added by Chuck aa0hw on April 20, 2018 at 11:34am — No Comments

QRQ CW in AFCW mode - test transmit 1 watt and observe audio quality and spectrum purity on webSDR

short test by transmitting CW at 1 watt on 10 meters - going to a websdr rcvr to listen and record the sound - look for how well using AFCW MODE on an ELECRAFT K3S performs for its spectral purity and waveform preservation of a well constructed raised cosine edged CW NOTE made by the ZamGate CW RE-Keyer - transmitted by an Elecraft K3S using a…

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Added by Chuck aa0hw on April 18, 2018 at 9:25am — No Comments

QRQ CW over 100 wpm - 121 wpm copy test - 700 hertz tone VERSES 821 hertz tone - which is better ?

brief demo of having 2 FLdigi(s) sending the same text file at 121 wpm...one FLdigi sending at the pitch of 821 hertz, the other sending at 700 hertz

there are a few QRQ CW OPS that can copy over 100 wpm that have reported in over the past years, stating that they prefer a higher CW PITCH when copying CW above 100 wpm...this short…

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Added by Chuck aa0hw on April 13, 2018 at 7:36am — No Comments

Using FLdigi to adjust TRIGGER MIDI MONO for perfect QRQ CW AUDIO input to QRQ CW MIDI NOTE DATA output - at 200 wpm

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ADJUSTING TRIGGER MIDI MONO for extremely accurate AUDIO VOLUME input to CW MIDI DATA NOTE output conversion

*********************************************************************

FLdigi will transmit a dit at 200 wpm(1khz [green]square wave using FLdigi's…

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

QRQ Morse Code Audio over Mumble Voip - low bit rate(8k) experiment using the ZamGate CW RE-Keyer

this is a follow up to the first video about this topic:

https://youtu.be/BgVdf55w13M

to see how well this RE-KEYING SOFTWARE SYSTEM could RE-KEY low bit rate qrq cw audio over MUMBLE VOIP at 60 wpm

FROM 1st Video on this topic:

low bit rate…

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Added by Chuck aa0hw on March 19, 2018 at 8:44am — No Comments

how to STOP your HAM RADIO RIG from sending CW NOTE edge noise harmonic spurs during TRANSMIT

the typical modern RIG, usually shapes its CW TRANSMIT waveform as a raised cosine edged cw note with a Rise and Fall time between 5 and 10 milliseconds....For this test a 7ms rise and fall time of a perfect raised cosine cw note created by FLdigi is used to represent the "modern rigs" and tested against another software CW KEYER called the…

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Added by Chuck aa0hw on March 2, 2018 at 12:22pm — No Comments

Remote Rig Audio over ip - using Zita-NJbridge - "16 bit" verses "24 bit" audio streaming - test and compare audio stream quality between bit rates

Brief test to see how well the ZITA-NJbridge software would do at streaming high quality, extreme QRQ CW, high speed Morse Code audio tones over the LOCAL AREA NETWORK(LAN)(audio OVER ip).  2 tests were done,  one using a "16 bit" digital audio PCM ZITA-stream and another test using a "24 bit" digital audio PCM ZITA-stream.   The ZITA-PCM 24 bit audio stream won the contest by a wide margin, and…

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Added by Chuck aa0hw on March 2, 2018 at 10:00am — 2 Comments

Internet access struggle

It's been a long hard road but I finally have net access good enough to do iCW. I live in a very rural area in the middle of about 60k acres of woods. Satellite internet just doesn't make it for iCW. Finally got a cell booster and found out 750 MHZ RF does NOT like trees. The system came with a 4 element yagi. Tried several different spots, not consistent enough. Now I've got an 8 element up around 70 ft. in a tree that has a somewhat clearer shot to the tower and it's working reasonably…

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Added by Steve Steltzer on February 17, 2018 at 12:57pm — No Comments

The Calf-Studio Software Morse Code CW KEYER - brief demo using Straight Key, Paddles & CW Keyboard

using the free LV2 apps from:

https://calf-studio-gear.org/

a software CW KEYER is constructed by chaining the apps together in an array that does the following...

1. a sidetone from the internal or external ports is routed first to the CALF EQUALIZER 5 BAND LV2 PLUGIN where the 1khz…

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Added by Chuck aa0hw on February 14, 2018 at 11:26am — 1 Comment

The ZamGate high performance, software CW KEYER - demo at 90 wpm

this video briefly shows how the ZamGate CW Keyer produces excellent CW AUDIO TONES that are precisely and accurately timed, from a CW TONE audio signal input at the ZamGate input "SIDECHAIN" port....in this case, the audio signal connecting to the ZamGate SIDECHAIN INPUT PORT is the rough, harsh audio output tone of YPLog(set to output a…

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Added by Chuck aa0hw on February 12, 2018 at 6:18pm — 1 Comment

Build your own "keyable" Morse Code Practice Oscillator using the free VCV RACK Modular Synthesizer

short demo of using the free open source modular synthesizer program - VCV RACK - to build your own software "keyable" Morse Code Practice Oscillator

the plugins shown used, are some of the basic default plugins that install with the VCV RACK program....the Morse Code CPO setup uses a typical basic framework to make a midi keyed…

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Added by Chuck aa0hw on February 12, 2018 at 12:17pm — No Comments

VB-AUDIO's Spectralissime Spectrum Analyzer on Linux - demo using FLdigi's CW wave shaping controls

VB-AUDIO's Spectralissime is working perfectly on LINUX LUBUNTU 16.04 using W.I.N.E and the WINEasio driver for JackRouter.  This is a windows program and this demo would also apply to a windows install of this excellent software audio spectrum analyzer.  This video below,  is a brief demo showing the spectrum readout of FLdigi sending cw at 40 wpm and varying the rise/fall time and toggling on & off - FLdigi's own unique and powerful CW bandpass filter…

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Added by Chuck aa0hw on February 3, 2018 at 11:09am — 2 Comments

QRQ CW over 100 wpm - tips, techniques and specialized QRQcw GEAR

This video is demo’N a setup to create a custom QRQ CW sine wave, raised cosine edged, ‘keyable’ oscillator

There are already 2 excellent programs for LINUX for a software QRQ CW KEYBOARD… FLdigi and TWQRQ...however, neither one of them are ‘keyable’ - this first video in a new video series on “QRQ CW OVER 100 WPM” uses Fldigi as a tool to…

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Added by Chuck aa0hw on January 4, 2018 at 1:44pm — 23 Comments

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