August 2022 Blog Posts (13)

Morse Code FULL DUPLEX *CW Keying DATA* ip Transmitter & ip Receiver - use Zamgate to encode/decode

ZAMGATE SIDECHAIN GATE mode does the ENCODING and DECODING

encoder uses the RECRI OSCILLATOR SDR MODULE at ZERO HERTZ as the CW DATA KEYING INSTRUCTIONS ENCODER https://github.com/recri/keyer

CW RE-KEYER:

ZAMGATE…

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Added by Chuck aa0hw on August 29, 2022 at 8:00am — 1 Comment

QSO online 'Alert OVER IP' sYsTEM - AUDIO FREQUENCY to SPECTRUM readout with TEXT OVERLAY

USES GSTREAMER script for both the SENDER and RECEIVER SEND 4Khz, 12Khz OR 20Khz to RX OP

here is the example using 4Khz

gst-launch-1.0 -v audiotestsrc freq=4000 ! audioconvert ! opusenc ! rtpopuspay ! udpsink host=(ip address of the RX OP) port=9999

RECEIVE OP script:…

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Added by Chuck aa0hw on August 27, 2022 at 6:48am — No Comments

QRQ CW REGENERATOR setup for a pi4 iCW/Mumble station: REgenerate both Mumble CW input and CW output

test to see how well a Pi4 MUMBLE iCW setup can handle all the apps it takes to setup up a MUMBLE INPUT and OUTPUT cw audio morse code RE-GENERATOR SYSTEM

80wpm QRQ CW test

https://sites.google.com/site/icwoip/

CARLA PLUGIN…

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Added by Chuck aa0hw on August 26, 2022 at 8:25am — No Comments

QRQ CW over SONOBUS using CARLA in MULTI-CLIENT Mode: key a 555, regen & filter for SonoBus sidetone

Brief Demo for sending QRQ CW over SONOBUS using KXstudio's Carla in "multiple clients" mode on a Raspberry Pi 4 SonoBus is also monitoring its input to be able to monitor the REGEN'd ZamGate CW sidetone in real time at near zero latency

a TLC555 is being keyed by FLdigi's serial port rts pin, TLC555 sending its audio…

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Added by Chuck aa0hw on August 17, 2022 at 10:52am — 1 Comment

12 CW Signals on the virtual VLF BAND: created using i/q quadrature encoding and LYSDR I/Q decoding

https://github.com/gordonjcp/lysdr

i/q encoding of CW Signals from -3kHZ to -30kHZ & +3kHZ to +30kHZ was done with 12 CW KEYBOARD from RECRI KEYER…

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Added by Chuck aa0hw on August 15, 2022 at 8:30am — 1 Comment

TWIN-T QRQ CW CPO's audio output gets filtered by the HI-PER-MITE Active Audio CW Filter - LIVE demo

http://www.4sqrp.com/hipermite.php

to reduce the unwanted harmonics & QRQ CW edge noise generated by a keyed TWIN-T's CW audio output...the HI-PER-MITE active audio cw filter is tested to see how well it cleans it up

Added by Chuck aa0hw on August 11, 2022 at 1:55pm — No Comments

Build a High Performance Morse Code Practice Oscillator with Raised Cosine edges using this setup

\

this setup uses the following hardware:

1. raspberry pi 4

2. TLC555 that is keyed by a CW KEYER's RIG KEYING jack...(the TLC555 is powered by the PI's own 3.3v power supply via its GPiO pins

3. usb sound card with LINE INPUT - this demo uses a Behringer UCA222 the keyed 555's…

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Added by Chuck aa0hw on August 8, 2022 at 11:30am — 2 Comments

HAM RADIO QSO FREQUENCY COORDINATOR /APP\ ~bpsk31~ over ip between OPs by FLdigi & Gstreamer scripts

test using bpsk31 over ip from one op to the other to coordinate frequencies for HF QSO NOTE: NO AUDIO is heard on this video demo....visual only FLdigi provies the ENCODING and DECODING of bpsk31 Gstreamer provides the OPUS codec encoding to convert bpsk31 from and to one OP to the other here are the scripts used in this…

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Added by Chuck aa0hw on August 7, 2022 at 1:36pm — No Comments

Pi4 iAMBIC CW Keyer, QRQ CW Keyboard & Straight Key - using a CW AUDIO to CW MIDI app & 2 key'D CPOs

this video is a follow up to the first video here: https://youtu.be/RQh_4JW6adw

this video adds a CW KEYBOARD, and straight key to the Raspberry PI 4 iambic CW keyer shown in the first video... by using a 2nd keyed CPO at a different PITCH than the 1st keyed CPO in…

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Added by Chuck aa0hw on August 7, 2022 at 9:01am — No Comments

pi4 CPO with Raised Cosine Edges: key TLC555 with iambics & FLdigi CW Keyboard - REgenerate CW on pi

TLC555 timer chip square wave oscillator is being 'keyed' (pin 4/pos rail) by a CW KEYER & its iambic paddles AND also being keyed by FLdigi using FLdigi's serial port keying setup via a usb serial port adapter and keying the serial port's RTS PIN Both the CW KEYER and FLDIGI are keying the diode side of an H11F1 FET OPTOisolator chip…

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Added by Chuck aa0hw on August 4, 2022 at 12:38pm — 1 Comment

Morse Code Audio over Mumble: alsa-loopback to interject a CW AUDIO bandpass filter for mumble input

snd-aloop

alsa-loopback cable

virtual audio cable

via a Gstreamer TEE SCRIPT to take a keyed oscillator at the mumble sound card input... filter it 1st... and then send it to two places...

1. the mumble USB sound card's output so you can monitor your own…

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Added by Chuck aa0hw on August 2, 2022 at 11:45am — No Comments

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