Chuck aa0hw's Blog (112)

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

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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

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 — 14 Comments

Transmit QRQ CW on your RIG in AFCW MODE - some advantages and tips on getting it to work well for qrq sending

click on the YOUTUBE icon at the bottom of any video in this 6 part series that you are interested in to see its discussion notes and links

One of the advantages of sending CW this way, is that you can send a very customized and optimized cw waveshape that has extremely low distortion and harmonic energy... extremely low key…

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Added by Chuck aa0hw on December 11, 2017 at 4:10pm — No Comments

Monitoring your SIDETONE from your MIC or LINE INPUT in Near Zero Low Latency delay using JACKROUTER

test results are shown(no sound on video) for hitting a lever that sends a TONE into the mic input jack of a laptop...a separate USB RECORDING MIC is placed at an equal distance from from both the LEVER and the SPEAKER (ABOUT 6 inches to mic from both the lever and the speaker) the MIC measures the TAP sound when hitting the LEVER and the final…

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Added by Chuck aa0hw on December 4, 2017 at 12:00pm — No Comments

CW AUDIO FILTER wars - The EngineersFilter - VS - MOD, CALF, & GLAME audio bandpass filters

Robin Schmidt's EngineersFilter is a remarkable software APP audio bandpass filter VST PLUGIN...this video demo shows a test to compare how well just ONE FILTER APP can take out all the harmonics of a harsh square wave CW SIDETONE...AND...output a MORSE CODE AUDIO NOTE waveform that looks the closest to a raised cosine edged CW…

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Added by Chuck aa0hw on December 4, 2017 at 9:03am — 1 Comment

Build a Morse Code CW SINE WAVE OSCILLATOR that sounds as good as FLdigi using FREE software

This is a QRQ CW COPY TEST - to see how close I could match the great sound of FLdigi's QRQ CW with a custom cw sine wave oscillator - built up by using AMsynth and the GLAME BANDPASS FILTER...NOTE: since you can not externally KEY FLdigi... i had to search for another way to be able to key CW manually/externally - from PADDLES, KEYBOARD or…

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Added by Chuck aa0hw on December 2, 2017 at 4:44pm — No Comments

Using VoiceMeeter on LINUX - how to QSO QRQ CW over the internet with VoiceMeeter & VBAN

Using VoiceMeeter on LINUX -  HAM RADIO - QSO QRQ CW over the internet with VBAN

Added by Chuck aa0hw on November 21, 2017 at 3:43pm — No Comments

Raspberry PI CW KEYER - CW Keyboard, Rig control & Log book- all with FLdigi

this video LIVE demo is using a Raspberry PI 2b and FLdigi together as a CW KEYER, remote rig control AND a logging book...

- FLdigi does it ALL !

- A BIG THANK YOU TO W1HKJ !!

- this setup does not tax the pi's cpu and runs perfectly

the first part of the video demo's receiving a station on 40 meters and changing some of…

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Added by Chuck aa0hw on November 2, 2017 at 9:38am — No Comments

Optimizing the Elecraft K3 CW TRANSMIT for FULL QSK at QRQ CW using FLdigi and 2 circuits

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…

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Added by Chuck aa0hw on October 30, 2017 at 2:00pm — No Comments

QSO qrq CW with another CW OP over the internet using just a simple VST, LV2, or AU plugin called - Studio-Link

Short demo of a MORSE CODE AUDIO sidetone QSO over the internet between 2 CW OPS using the FREE LV2 plugin - STUDIO-LINK -…

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Added by Chuck aa0hw on October 7, 2017 at 8:43am — No Comments

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