March 2023 Blog Posts (5)

Morse Code\\Contour CW MODE// sending 2-D CW NOTE framework data OVER iP instead of CW AUDIO over iP

uses RECRi KEYER CW & SDR modules: https://github.com/recri/keyer RECEiVE

OP can choose at what CW AUDIO Pitch whey want to listen to, with the RECRi KEYER's SDR MIXER MODULE

NOTE: OPUS CODEC will not work to send Contour…

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Added by Chuck aa0hw on March 22, 2023 at 7:58am — No Comments

unixCW sending CW @30kHZ on VLF BAND using ALSA LOOPBACK cables - TX/RX demo using FERRiTE ANTENNAS

UNiXcw using this script to keep the TEXT FiLE to CW sending on an auto-repeating endless cycle, (until you hold CTRL/c down until it stops) qrq@qrq:~/Downloads/unixcw-3.6.0/src/cw$ while true; do (./cw -d hw:1,1,1 -f teslalecture1.txt -w 60 -k 50 -t 30000 -v 90); sleep 1; done…

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Added by Chuck aa0hw on March 17, 2023 at 9:01am — No Comments

TRiPLE RESONANT TUNED High "Q" TX & RX Large Ferrite Rod Antennas for VLF CW operations - LiVE DEMO

FERRITE TX ANTENNA is max tuned for PEAK SIGNAL OUTPUT on 30Khz VLF CW input windings of ferrite rod TX antenna is SERIES TUNED by CAPs and output windinws of ferrite rod TX antenna is PARALLEL TUNED by CAPs FERRITE

RECEIVE ANTENNA is max tuned for PEAK SIGNAL RECEIVE signal on 30Khz VLF CW by a .1uF cap and the BEST coil…

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Added by Chuck aa0hw on March 14, 2023 at 1:12pm — 1 Comment

Pulse Density Modulated HF CW Transmitter/afcw mode\ {Saves Battery Power !} for portable operations

since the TRANSMITTER is not using full duration CW ELEMENTs(using AFCW MODE)(a2) Battery Drain should be less when operating portable via PDM-CW methods

ZAMGATE is the PDM-CW encoder: https://www.zamaudio.com/?p=976

GSTREAMER SCRIPT provides…

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Added by Chuck aa0hw on March 8, 2023 at 2:16pm — 2 Comments

using GASSiAN NOiSE CW notes for sending Morse Code over iCW on Mumble - CW regenerated on mumble RX

instead of sending pure sine wave CW notes over Mumble, "GAUSSIAN NOISE" CW NOTES are used to see if GAUSSIAN NOISE CW audio performs better over iP on Mumble(OPUS CODEC), than pure sine wave CW audio

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

CW…

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Added by Chuck aa0hw on March 8, 2023 at 9:25am — No Comments

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