All Blog Posts (134)

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

Tahrpup 6.0.6 live dvd remaster by i8cee full ham radio iCW for ever.....

Hi guys,

My personal remaster of tahrpup 6.0.6 live cd now full ham radio software digital mode, last qsstv , qtel(echolink), wsjtx ft8 mode and of course iCW full working using fldigi keyboard, setting of pulseaudio, pavucontrol and paprefes and more ....

Tested it is very light version and running very speed all in memory, live version doesn't need install... enjoy and have nice qrq !

Sorry for my english. Ciao de i8cee,Sal

link to download ( version 2.1 dvd…

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Added by i8cee -Salvatore Cecere on October 27, 2017 at 3:11pm — 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

Remote CW Keying over the internet of an Elecraft K3S - QRQ CW test - 80 wpm

Using an audio derived cw keying circuit to key CW on the K3S : http://qrqcwnet.ning.com/forum/topics/what-circuit-for-computer

- with the circuit attached to the K3S cw keying jack...and being key'ed remotely via a voice chat program called MUMBLE:…

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Added by Chuck aa0hw on August 14, 2017 at 11:40am — 4 Comments

Automatic Volume Level Control - AGC - with the LINUX Audio APP - VLeveL - Live demo

using MUMBLE and MORSE CODE audio tones, and varying the Mumble output volume from 15 percent to 200 percent, this video demo's VLevel keeping the volume output of Mumble to be extremely stable at a near zero DB final audio output to the sound card, no matter the level of volume at VLeveL's input...VLevel is acting as an AUTOMATIC GAIN CONTROL,…

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Added by Chuck aa0hw on August 8, 2017 at 8:00am — No Comments

Morse Code audio QSO over IP - using the WIRE DESKTOP APP

Brief demo of what a morse code audio QSO over IP sounds like - using the WIRE DESKTOP APP

The Wire Desktop APP software

https://wire.com/en/

https://github.com/wireapp/wire-desktop

Description

Secure, end-to-end encrypted messenger…

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Added by Chuck aa0hw on July 21, 2017 at 1:20pm — 1 Comment

Elecraft K3(S) IF filter study - OEM vs Aftermarket

Hi everyone,

A few weeks ago, I found some relatively cheap Chinese K3(S) IF filters on eBay. Since I recently purchased a K3 (with the new synthesizer), I was wondering if the offered 250 Hz and 500 Hz filters are any good. I ordered two of each variant and a 200 Hz filter from Elecraft, in order to have some comparison models. I also measured the filters that were already present in my rig and concluded which filter combination and settings are best in my…

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Added by Wolf on July 9, 2017 at 2:52pm — No Comments

using the LINUX LV2 PLUGIN - Trigger Midi Mono - as a morse code practice oscillator

SETUP: an UltraPico Keyer, keys a 555 TIMER CHIP..from the audio output of the 555, an audio cable is attached and goes to the input of a laptop's mic jack input...the 555 time chip sidetone is very rough sounding with lots of high pitched harmonics and key clicks...INSTEAD of trying to filter the 555's raspy tone, this video demo's using TRIGGER…

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Added by Chuck aa0hw on June 25, 2017 at 11:01am — 12 Comments

Multi CW OP - Morse Code QSO'n over the internet - with this free STEREO AUDIO CONFERENCING APP

SEREN - FULL MESH, P2P AUDIO, FULL DUPLEX, HIGH FIDELITY, with adjustable bit rate..mono or stereo....using the OPUS CODEC



- LIVE DEMO SETUP -

1st SEREN OPERATOR, will act as the Central SEREN NODE using a Raspberry Pi that is always "ON"...two more SEREN operators will connect to the PI's SEREN NODE and automatically be…

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Added by Chuck aa0hw on April 19, 2017 at 2:09pm — No Comments

QRQ CW test sending 80 wpm over the internet using a free open source VOIP app called GLAZE

GLAZE is a very simple p2p audio app for WINDOWS, MAC and LINUX that lets you easily create a voice chat room, call it whatever you like and you can have your fellow Morse Code OPS join you on GLAZE with just the name of the room. - no subscription required....no logins...no passwords...just the name of the room, and then type in any user name you…

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Added by Chuck aa0hw on March 7, 2017 at 3:00pm — No Comments

Morse code online CW NET - experimental multi CW OP conference setup using MUMBLE

this video demo's 3 cw ops transmitting over MUMBLE, in the same channel, on iCW at the same time and yet on the receive side, each op's individual audio stream is able to be controlled using this experimental setup using all free software.

EXPERIMENTAL TEST SETUP

3 different cw ops are sending at different speeds and different pitches…

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Added by Chuck aa0hw on February 26, 2017 at 6:33pm — No Comments

QRQ CW - G729 vs iLBC(audio over ip codecs) - low bitrate performance test for morse code

2 low bitrate codecs are compared for how well they sound transmitting CW AUDIO TONES over the internet(FLdigi)...and then how well they do when their original low bitrate cw audio is regenerated using all free software vst plugins

here is a snapshot comparing the original waveforms of the 2 low bitrate codecs:…

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Added by Chuck aa0hw on February 25, 2017 at 9:08am — No Comments

QRQ CW - MORSE CODE Regeneration software - Live Demo

This video demonstrates an A/B comparison of transmitting morse code audio tones over the internet using a NINJAM SERVER, where the CW audio quality is usually poor, with lots of pops and clicks...however, if you use the original audio from the output of the NINJAM CLIENT, and divert it first to a software APPLICATION in order to regenerate the…

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Added by Chuck aa0hw on February 24, 2017 at 4:22pm — 5 Comments

QRQ CW TRAINING - with a variable speed Morse Code midi file player setup

This video demo's how to create a TEXT TO MORSE CODE MIDI FILE - to use for training in QRQ CW COPY. REAPER is the main APP for playing the morse code midi file. This method allows you to choose the CW PITCH, the VOLUME, the SPEED, THE RISE and FALL TIMES of the CW EDGES.. Some more advantages of using a MIDI FILE instead of an audio file for…

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Added by Chuck aa0hw on February 7, 2017 at 1:20pm — No Comments

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