Chuck aa0hw's Blog (403)

A multiple DSP PLUGin(s) Connection Bay for PulseAudio using "Carla" - QRQ CW over SonoBus example

CARLA

https://kx.studio/Applications:Carla

SETUP: A FET H11F1 OPTOisolator is being 'keyed' by the serial RTS PIN from FLdigi's CW KEYBOARD... the output of a 555 square wave oscillator is running continuously and attached to the output pins of…

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Added by Chuck aa0hw on June 24, 2022 at 7:00am — No Comments

QRQ CW harsh square wave notes from 555 CONVERTED to a pure sine wave notes with raised cosine edges

This Gstreamer Script has the internal BandPass Filter used by the PI to take the QRQ CW SQUARE WAVE notes(@84wpm) from a 555 timer chip CPO's audio output, that is being keyed by a CW KEYBOARD, with the 555 output going to the PI's usb mic jack input...this Gstreamer Script filters out all of the harmonics AND puts a raised cosine edge on it…

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Added by Chuck aa0hw on June 17, 2022 at 11:42am — 3 Comments

CW SIDETONE CLEANER - polish up and take the harshness out of that Sidetone with Zamgate & BP Filter

zamgate is a used as a 'GATE', to help balance and equalize the RISE/FALL time of the original CW NOTE passing through it

https://www.zamaudio.com/

a BANDPASS FILTER, finishes the job by cleaning up and reducing the unwanted/unpleasant Morse Code audio…

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Added by Chuck aa0hw on June 16, 2022 at 7:55am — 3 Comments

sending QRQ CW over SonoBus on an iPHONE using a lightning to headset adapter & CW Keyboard Keyer

brief demo of keying a TWIN-T sine wave oscillator and sending the CW AUDIO TONE output from the TWIN-T to the MIC INPUT of an iPHONE LIGHTNING to HEADSET (Mic & Headphone) adapter…

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Added by Chuck aa0hw on June 13, 2022 at 12:26pm — No Comments

QRQ CW Keying of a TWIN -T sine wave oscillator - LIVE demo @60 wpm - show waveform & spectrum of CW

built this TWIN -T - long time ago with the idea to be able to adjust the RISE and Fall TIME individual(via steering diodes) using the 3 variable resistor POTs for pitch, symmetry & rise/fall time circuit also uses a 5V regulator to stabilize the pitch and a 10K output resistor before going to audio input of…

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Added by Chuck aa0hw on June 10, 2022 at 1:30pm — 2 Comments

Build a "keyable" Morse Code Practice Oscillator using the free Cardinal Modular Synthesizer

Build your own 'MIDI' "keyable" Morse Code Practice Oscillator

using the free CARDINAL MODULAR SYNTHESIZER

https://kx.studio/News/?action=view&url=cardinal-2202-is-now-released…

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Added by Chuck aa0hw on June 9, 2022 at 8:00am — 2 Comments

using a variable PULSE GENERATOR Gstreamer script - to help adjust in realtime, a CW Bandpass Filter

Gstreamer Script used in this demo:

gst-launch-1.0 -v audiotestsrc wave=ticks apply-tick-ramp=false tick-interval=100000000 freq=2000 volume=0.5 sine-periods-per-tick=40 ! audioconvert ! autoaudiosink

also being shown in this demo is CW REGENERATION, using ZAMGATE in sidechain…

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Added by Chuck aa0hw on June 3, 2022 at 10:23am — No Comments

LSP PLUGINS to create a 'keyed' MORSE CODE PRACTICE sine wave OSCILLATOR with raised cosine edges

https://lsp-plug.in/

SIDECHAIN GATE MONO

and

OSCILLATOR MONO

IN sidechain mode, the gate will not let the OSCILLATOR MONO SINE WAVE pass through its upper port

however, when keyed by another CW…

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Added by Chuck aa0hw on June 3, 2022 at 7:49am — No Comments

Text Message Encoding @ 200 wpm taking up only 20 hertz of RF BANDWDITH using Extreme Narrow Band CW

RE: ENB-CW please see this playlist here for more info on this new CW MODE: http://www.youtube.com/playlist?list=PLfFan4sDonOf2O3s6PKh4fnDhEXrRaBut…

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Added by Chuck aa0hw on June 2, 2022 at 9:26am — No Comments

get rid of HIGH "Q" CW Narrow Band Filter Ringing with a GATE DSP plugin & filter: live demo @ 80wpm

GATE plugin used in this demo if from CALF STUDIO PLUGINS

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

Added by Chuck aa0hw on May 31, 2022 at 9:41am — No Comments

Key your RIG using FLdigi's new SERIAL PORT DTR/RTS CW RIG keying feature

The accuracy of having FLdigi key the RIG using its new serial port DTR/RTS keying circuit ...looks impression on first testing...

TESTING  at          120 wpm,  150 wpm and…

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Added by Chuck aa0hw on May 28, 2022 at 12:46pm — 1 Comment

Raspberry PI 4 - CW Morse Code Audio Tone Regenerator - using PI-APP's Reaper DAW's own plugins

pi-apps has a REAPER download REAPER contains all of the plugins to REGENERATE CW

https://pi-apps.io/

throw any kind of sidetone into the REAPER INPUT and REAPER OUTPUTs a pure SINE WAVE, raised cosine edged CW AUDIO TONE, that perfectly clones the exact length of every…

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Added by Chuck aa0hw on May 27, 2022 at 7:44am — No Comments

SonoBus i/q Stereo - VLF CW/IP - Morse Code server - on a Raspberry PI 4 - uses LYSDR to demodulate

TEST SETUP to use SonoBus in a LOOPBACK SERVER MODE (you have to mute all contacts but the PI 4 server) https://sonobus.net/

TO SEND VLF RF CW directly, and send in i/q stereo you need a CW KEYER like Recri Keyer…

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Added by Chuck aa0hw on May 26, 2022 at 8:59am — No Comments

copying QRQ CW in a TUNED RESONANT HIGH "Q" system - DEMO a GATE between 2 CW audio bandpass filters

QRQ CW TRANSMITTER & RECEIVER are both using HIGH Q resonant systems on their Ferrite Loopstick ANTENNAs


PROBLEM - HIGH Q will cause ringing and MUSH on the RECEIVE signal


SOLUTION - use a GATE between 2 CW AUDIO BANDPASS filters

Added by Chuck aa0hw on May 16, 2022 at 10:10am — No Comments

Raspberry PI 4 complete CW KEYER(iambics, st key & keyboard) using free software from LSP & Recri

https://lsp-plug.in/?page=manuals&section=trigger_midi_mono

https://github.com/recri/keyer

CW KEYER SETUP overview: 4 different 555 timer chip oscillators that have been set to…

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Added by Chuck aa0hw on May 10, 2022 at 10:47am — No Comments

DIY QRQ CW VLF TRANSMITTER & RECEIVER for Spelunking Loving QRQ CW OPs: Through The Earth(TTE) comms

this video is a follow up video form the 1st one here:

https://youtu.be/VoPIm9EdMqo

this video demo's the QRQ CW high speed morse code capability

of this TTE COMMUNICATIONS SYSTEM at VLF…

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Added by Chuck aa0hw on April 25, 2022 at 1:10pm — 1 Comment

ATTENTION: QRQ CW NET OPs - can't hear the other OP(s) ? then use this FREE websdr setup and send the weblink

if you are using WEB SDR's to hear the other OP,   and don't like the long delay, try setting up a local web sdr using the following video's method and the free STREAMMyAUDIO service...then you can simulcast your TRANSMIT CW SIDETONE to your headphones AND this free STREAMING SERVICE so that any other OP(s) can go to the web link on the STREAMmyAUDIO's LIVE web page and pick up your RIG's TRANSMIT CW audio in almost REAL TIME with very low delay...  here is a LIVE demo of this setup in…

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Added by Chuck aa0hw on April 20, 2022 at 9:55am — 1 Comment

UltraSonic Morse Code EMF COIL EMITTERs sending QRQ CW at a frequency of 21.121 Khz & speed of 82wpm

brief demo of sending QRQ CW via ULTRASONIC EMF using TWIN FERRITE BOBBIN CORE INDUCTOR COILs as the Ultrasonic EMF Emitters

Added by Chuck aa0hw on April 19, 2022 at 1:29pm — No Comments

Extreme Narrow Band CW @ QRQ, ELF 738hz Transmitter & Receiver, uses Trigger Midi Mono to demodulate

testing out a LARGER FERRITE CORE(loopstick)TRANSMIT ANTENNA fed by a 10 watt CLASS D audio amp transmitting an Extreme Narrow Band CW(ENBcw) ELF 738hz SIGNAL OUTPUT

see the ENBcw playlist for more info on how ENBcw is setup....…

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Added by Chuck aa0hw on April 9, 2022 at 11:58am — No Comments

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