October 2022 Blog Posts (10)

ipad2 as a QRQ CW TYPING SCREEN MONITOR for a Raspberry pi 4 CW KEYBOARD setup(via RealVNC on ipad2)

brief test to see how well an old ancient ipad2 can handle/perform... the task of being a remote monitor screen for typing on a software CW KEYBOARD that is resident on a Raspberry Pi 4 CW KEYBOARD setup(by recri keyer) https://github.com/recri/keyer

the ipad2…


Added by Chuck aa0hw on October 29, 2022 at 9:05am — No Comments

Pi 4 CW Keyer / QRQ CW Regenerator - using Python GPIO pin 7 square wave & an H11F1 FET Optoisolator

this video is a follow video - from the 2 previous videos here on this topic:



in this video the same setup as in the 2nd video above is used…


Added by Chuck aa0hw on October 27, 2022 at 8:58am — 2 Comments

Raspberry pi4 CW Keyer & MiDi CW over iP Transceiver - LIVE demo

pi4 is operating as a CW Keyer, using a TLC555 that is keyed by external KEYERs, the CW is recreated into a NEW CW NOTE inside the pi4...at NEAR ZERO LATENCY - also.... it is operating as an Midi CW ip TRANSCEIVER for a full duplex, 2-way CW QSO over the internet

GSTREAMER is providing the code for the ip CW…


Added by Chuck aa0hw on October 20, 2022 at 10:23am — No Comments

Remote Rig/pi2b interface\\ REMOTE OP/pi4 station\\ RIG=ELECRAFT K3S/ AFCW QRQ CW Keying\\ LIVE DEMO

REMOTE AUDIO over ip by PYTHON/gstreamer/ pi2b TCP SERVER and pi4 TCP CLIENT to SEND transmit AFCW TO RIG and receive audio from RIG on the REMOTE

OPs pi4 station pi2b is using ALSA in the PYTHON SCRIPT AFCW KEYING SETUP - uses the RECRI KEYER cw and sdr apps…


Added by Chuck aa0hw on October 20, 2022 at 8:13am — No Comments

High Performance Raspberry Pi4 CW CPO/CW Keyer(CW RE-generator) using KXstudio CARLA APP - LIVE demo

CARLA on this raspberry pi 4 is using the ALSA AUDIO ENGINE, with a USB SOUND CARD(Behringer UCA222) 48Khz sample rate, 3 periods of 64 buffer frames - for lowest possible latency for this operation https://kx.studio/Applications:Carla

CARLA is using 1 lv2…


Added by Chuck aa0hw on October 15, 2022 at 8:37am — 2 Comments

TX/RX CW over iP using RTP MiDi over The Secure Reliable Transport Protocol *via Gstreamer pipelines

several advantages for using the SRT protocol for sending & receiving CW RTP MiDi over ip for Morse Code OPs to QSO online with each other:



Added by Chuck aa0hw on October 14, 2022 at 7:25am — No Comments

QRQ CW *Symmetrical* Raised Cosine VS *Asymmetrical Exponential CW NOTEs - LIVE demo

QRQ CW test comparing the sound of symmetrical raised cosine CW NOTEs with asymmetrical exponential CW NOTEs

Added by Chuck aa0hw on October 12, 2022 at 9:30am — No Comments

HAM RADIO Python projects: SQUARE WAVE to SINE WAVE converter for a Morse Code Practice Oscillator

using a modified PYTHON SCRIPT from: https://brettviren.github.io/pygst-tutorial-org/pygst-tutorial.htm

GSTREAMER python code used in this PYTHON SCRIPT example:

# Set up the gstreamer pipeline self.player =…


Added by Chuck aa0hw on October 7, 2022 at 12:28pm — 3 Comments

CW Keyer's audio output to pi4 soundcard input - converted to CW MiDi - send over iP to another CWop

uses REAPER's free vst plugin REAGATE CW AUDIO input to CW MIDI OUTPUT


send CW MIDI OVER TCP/ip to other OP(s) by Gstreamer script

gst-launch-1.0 -v alsamidisrc ! queue ! rtpgstpay ! rtpstreampay ! queue !…


Added by Chuck aa0hw on October 6, 2022 at 9:53am — No Comments

2 Python APPs, a raspberry pi TCP server, OP's laptop, for low latency REMOTE RIG AUDIO over TCP/ip

using a modified PYTHON SCRIPT from: https://brettviren.github.io/pygst-tutorial-org/pygst-tutorial.html this video shows a send & receive CW to and from the RIG PI INTERFACE example... by RiG/Pi TCP SERVER(pi2b) & REMOTE LAPTOP…


Added by Chuck aa0hw on October 5, 2022 at 7:56am — No Comments

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