Chuck aa0hw's Blog (406)

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…

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

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....…

see video notes on the VIDEO's DESCRIPTION tab...

   - at the 'Watch on YouTube' website

             for more info on this setup

https://www.arrl.org/files/file/Technology/tis/info/pdf/9208019.pdf

Brief demo of the KK7B High Performance Direct Conversion Receiver on the VLF BAND - 16Khz CW ....using the KK7B -1 KHZ - on board - CW audio filter kk7b antenna = ferrite…

Brief demo of using a TESLA COIL with a ferrite core, self resonant at @ 75Khz - sending QRQ CW at 75 wpm The tesla coil primary winding is about 7 turns, fed by a 10 watt audio amp both TX/RX use soundcard SDR's with soundcards operating at 192Khz sample rate using the RECRI KEYER SDR modules and CW KEYBOARD to modulate and demodulate at…

brief demo of using a parallel resonant LC circuit resonant at the CW PITCH for the HD-1416 output and then a series resonant LC circuit that is connected to the SPEAKER

both FERRITE BOBBIN CORE INDUCTOR COILS are 1.8mH

https://www.culturehub.org/livelab

https://github.com/CultureHub/LiveLab…

see video description notes for more info on these setups

demo of using the Rohde's AM Detector to make a homebrew AM RECEIVER

http://www.pan-tex.net/usr/r/receivers/elrpicamdetect.htm

demodulating a 33.7Khz AM Signal from an IP STREAM via the wavpack codec encoder/decoder on a pc…

brief demo of operating the YPLOG CW KEYBOARD on a Raspberry PI via the WINE PACKAGE from

pi-apps

https://github.com/Botspot/pi-apps

TEST sending i q stereo into TWITCH

using 16 CW keyboards from a Raspberry PI 4 that is sending CW from 25 wpm to 100 wpm in 5 wpm steps

from -16Khz to -2Khz and +2Khz to +16Khz (2Khz steps)

QUISK SDR…

Mixxx allows you to go back a word or two(or more) to play again, a word or phrase that you may not have copied fully Mixxx also allows you to adjust the SPEED of the QRQ CW COPY PRACTICE session - 'on the fly'

NOTE: to keep the pitch the same, no matter the MIXXX variable speed setting, ZAMGATE and a pure sine wave…

Build your live video app in 5 minutes Get 10,000 FREE minutes every month…

experimental CW KEYING DATA modulation of a 12Khz VLF RF carrier that uses attoWatt modulation to achieve its goal of sending CW through the VLF CARRIER with the embedded attoWatt CW Keying data on it...

RECEIVER

VLF RF signal, is sent to a ZamGate sidechain GATE APP, which is able to extract the CW…

experimental setup to encode CW KEYING DATA that looks a bit like BRAILLE onto a 16Khz VLF RF carrier - basically micro-modulating the tiniest increase in the 16Khz VLF RF carrier's power output that is directly in line with the timing of the arriving CW ELEMENTs that encoded the CW "BRAILLE" onto the VLF RF carrier by the ZAMGATE CW BRAILLE…

https://www.charachorder.com/…

slow down the voice using: http://manpages.ubuntu.com/manpages/bionic/man1/stretchplayer.1.html

the encoded QRQ CW DATA is inaudible & virtually undetectable all you hear is a low volume 60 hertz signal, until the ZAMGATE DECODER is used to extract & produce actual CW NOTEs from the embedded CW KEYING DATA attached to the 60 cycle hum signal stream..... this encoding/decoding method can be used LIVE or implanted in a "safe"…

Experimental CW MODE - embedding CW ELEMENTs onto a VLF CARRIER by increasing the volume slightly of the VLF CARRIER per each CW ELEMENT, the process includes 5ms Rise/Fall times of the VLF CARRIER EMBED Process(uses ZamGate in sidechain mode)

a MORSE CODE keyer / keyboard APP sends its output to the TRIGGER PORT of a…