All Blog Posts (134)

CWMaestro - A morse code cw sending keyboard program written for the DOS operating system decades ago...still working by using the DOSBOX program which has versions for windows, linux and mac. This keyboard software also has a logging program and adjustable cw timing settings, hot key creator, custom messages...etc...

CWMaestro is a…

40 METER LIVE CW QSO with W2XB using this remote setup:

the remote site where the remote op is located, is a WINDOWS 10 computer, over the internet, connecting to the K3S Elecraft's Raspberry Pi hardware/software interface via Tight VNC viewer and JackTrip(audio). The audio from and to the K3S, is achieved in low latency using JACKTRIP(has…

- IAMBIC and STRAIGHT KEY from:https://github.com/recri/keyer

- cw keyboard is from FLdigi : http://www.w1hkj.com/

once built and compiled, the Recri Keyer software will allow both STRAIGHT KEY and IAMBIC KEYER at the same time via a USB MIDI DEVICE(s)…

Using a Raspberry Pi hardware/software interface connected to an Elecraft K3S rig, this video live demo's how it works to use the RazPi remote config to connect to the K3S over a remote ip location from another computer in real time... and receive and transmit cw and ssb.(i was able to qso cw with W8ACM for this demo)

Basic Setup…

An experimental setup simulation for a RASPBERRY Pi LAN PARTY using 6 Raspberry Pi cw ops - all connected to the Ethernet switch/router local area network...sending and receiving morse code MIDI DATA to each other, using QmidiNet with LINUX NATIVE REAPER providing all the morse code software to convert cw audio to midi messages for transmit, and…

The Raspberry Pi is first setup as a code practice oscillator using LINUX NATIVE REAPER and its own plugins. Then using a circuit similar to this: http://i.imgur.com/C2qYIPm.png , a 555 timer chip is keyed by a FET optoisolator that connects to a CW KEYER's key-RIG OUTPUT jack. In this video a…

From: https://github.com/recri/keyer and https://github.com/recri

a free open source LINUX iambic morse code keyer designed by AD5DZ.

CONCEPT: activate 2 different MIDI NOTE MESSAGES by an external MIDI DEVICE connected…

With a morse code practice oscillator and a morse code hardware mechanical straight key - TAPPING THE KEY, and sending an audio tone into the MIC JACK INPUT, this video demo's the typical mechanical switch bouncing that takes place and causes breaks/gaps in the audio tone output...and then it shows a very effective LINUX NATIVE REAPER…

Demo of the Recri iambic software cw iambic keyer for LINUX working on a Mint 17.3 i7 quad core 64 bit LINUX laptop: https://github.com/recri/keyer

Midi Notes ZERO and ONE are being used to key the dits and the dahs...by using the letters S and Z on the laptop keyboard(usingVMPK)...however, there…

This video highlights some of the top capabilities of the Raspberry PI 2b, to send a seperate LEFT and RIGHT channel audio signal to 2 different audio derived cw keying circuits in order to KEY the Elecraft K3's CW JACK for STRAIGHT KEY and IAMBIC PADDLES and to KEY the Elecraft's PTT & CW jacks in sequence when operating cw keyboard with…

Morse code software regeneration of a previously recorded wave file of a QRQcw qso over iCW.(https://sites.google.com/site/icwoip/)



The VST PLUGIN doing the…

Using Linux software , a CW KEYER, iambic paddles, and a straight key are demo'd in this video...all morse code instruments are ready to send cw at any time in "near zero" low latency so there is no lag felt when keying any of these virtual Linux software morse code generators with your actual hardware iambic paddles, or straight key...

or…

Using LINUX MINT 17.3 and some free DSP AUDIO LV2 Linux plugins...it is possible to get better cw keying on your Elecraft K3 and more versatility by bringing in the ability to use your ST KEY and IAMBIC PADDLES ... while preserving fast QSK full break in.

This is done by using AFCW A2 CW MODE and injecting a CW AUDIO TONE into the…

This video demo's a Raspberry Pi being setup as a high performance morse code cw keyboard that keys a rig with just the analogue audio output sound card of the pi...where the pi's audio output goes to 2 individual audio derived cw keying circuits which in tandem key both the PTT first on the K3 and then the CW JACK on the…

Brief demo of TWQRQ(by WA0EIR), running on a Raspberry PI2b

- qrq cw sent at 75 wpm, text is from w4bqf's famous article:

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

for more info and to request the latest beta version of TWQRQ please write…

This video demos a - low cpu use - software setup - for sending and receiving morse code over Mumble Voice Chat on iCW using only the single analogue audio output of the Raspberry Pi the bcm2835 alsa sound card(output only)

NOTE: Raspbian Debian Jessie is the OS for this RazPi2b



for the lowest CPU use and…

The ability of the A-law PCMA G.711 audio codec to transmit extreme qrq cw audio tones over the internet, is tested using the SIP VOIP CLIENT Ekiga. https://ekiga.im/

FLdigi sends a text at 120 wpm from TOM's famous qrq cw article:

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

to the input of Ekiga, and Ekiga is connected to an ECHO REFLECTOR so you can hear your…

Testing the ability of iLBC (internet Low Bitrate Codec) to transmit and receive morse code audio tones over the internet with low bandwidth used and good packet loss concealment. By itself, this codec does not make for pleasant copy, however, if the received tone is regenerated, the iLBC CODEC seems to provide a highly dependable internet audio stream of full duplex morse code audio notes...for a QSO between 2 or more cw ops over the internet with low latency - and good qsk -…

Using 2 seperate Jitsi voip clients/computers, that were connected to each other over the internet, this video demonstrates the audio quality of the morse code audio tones as they are transmitted from one SIP CLIENT to the other SIP CLIENT over the Session Initiation Protocol / VOIP / internet pathways. 



Codecs tested for morse code audio quality are:

1. iLBC / 8000

2. Silk / 8000

3. G722 /…

A qsk qrq cw performance test for the Elecraft K3S from 100 wpm to 60 wpm....K3S set to FULL QSK, qrq cw mode enabled

RESULTS: at 100 wpm several of the dits were way too short causing harsh audio…