Chuck aa0hw's Blog – June 2022 Archive (14)

using FLdigi on pi4 to key CW on RIG via RTS serial port pins & send out CW AUDIO at the same time

when using FLdigi 's serial port KEYING function....it seems to change whatever the CW PITCH was before, and move it up to 1500 hertz... to get it back to a desired PITCH 3 plugins are used to RE-CREATE the FLdigi CW audio note output...

SINE WAVE GENERATOR

ZAMGATE (in sidechain…

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Added by Chuck aa0hw on June 30, 2022 at 12:18pm — No Comments

using a simple Calf BandPass Filter LV2 plugin to clean up square wave, raspy, harsh sidetone QRQ CW

CALF STUDIO GEAR

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

ZAMGATE

https://www.zamaudio.com/

setup

FLdigi is keying the PI 4's usb serial port's RTS PINs the RTS pin is…

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Added by Chuck aa0hw on June 30, 2022 at 11:10am — No Comments

Remote QRQ CW Keying(AFCW mode) & Receiving of a Rig(K3S) over IP using a Raspberry Pi2b & Sonobus

https://sonobus.net/

the PI2B, still has enough 'power' to function as a REMOTE RIG OPERATIONs interface FLrig(from the pi2b's installed apps) is used to control many functions of the K3S

using ssh -X the PI2b's FLrig GUI appears on the remote laptop's…

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Added by Chuck aa0hw on June 27, 2022 at 8:21pm — No Comments

QRQ CW QSO over ip using "1" multi-function multipurpose Gstreamer script on a Raspberry PI 4

GSTREAMER SCRIPT used in this example on the PI 4:

*******************************************************

pi@raspberrypi:~ $ gst-launch-1.0 -v alsasrc device=hw:3 ! "audio/x-raw, layout=(string)interleaved, rate=(int)48000, format=(string)S16LE, channels=(int)2,…

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Added by Chuck aa0hw on June 24, 2022 at 12:14pm — No Comments

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

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