All Blog Posts Tagged 'qrq cw' (248)

testing QRQ CW using a GAUSSIAN-25 raised cosine window, through HIGH Q, RESONANT, TUNED, FERRITE ROD TRANSMIT & RECEIVE ANTENNAs on the VLF BAND at 3.6Khz

towards the end of the video, several other RAISED COSINE WINDOWS are selected to see how they LOOK/SOUND compared to Gaussian-25

CW KEYER and…

the ZAMGATE CW wave shape RESTORATION system, takes the incoming HiGH Q, RiNGiNG and distorted QRQ CW waveshape, from a 3.5kHZ ULF QRQ CW SiGNAL, and restores it to a pristine, raised cosine adjustable rise/fall time, adjustable pitch CW WAVEshape CW NOTE

The distorted, ringing QRQ CW waveshape seen in this video is from a…

unixCW script to send a text file that keeps repeating until you hit/hold Ctrl-C until it stops... ~/Downloads/unixcw-3.5.1/src/cw

$ while true; do (./cw -d hw:0,1,0 -f YOURTEXTFILE.txt -w 40 -k 50 -t 20200 -v 8); sleep 1; done

NOTE:

-t = frequency that unixCW sends out…

using a biploar tesla coil with a large ferrite core, 30 windings primary input, and 300 turns secondary output both input and output are tuned for MAX signal output at 21Khz

- input is tuned by a .1uF series resonating CAP, and output is tuned by a .001uF parallel resonating CAP

QRQ CW example for…

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…

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…

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…

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…

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…

brief demo of sending Midi CW over the internet to key midi input CW sine wave oscillator APPs; using a PRIVATE ZEROtier network where you don't have to port forward routers, but you do have to be an accepted, authorized member of the ZEROTier NETWORK that is being used more details of setting up

NETJACK from…

CW MAESTRO inside DOSBox-X seemed to work much better than using the native DOSBox app(for linux) the QRQ CW audio output was more stable using DOSBox-X(normal dosbox itself had lots of audio dropouts with the same settings) CW MAESTRO FULL VERSION by permission of CW MAESTRO creator/DEV available here for download(.7z file)…

Using just a Raspberry PI and the RECRI KEYER's  software CW KEYBOARD

with the Pi's own native bcm2835 headphone output

This setup is QRQ fast from TYPING on the SCREEN and hearing the CW AUDIO SIDETONE from the pi4's headphone jack   …

using the CW KEYBOARD that is already loaded up on a Raspberry Pi4 on the local network using ssh -X via Xquartz for the mac https://www.xquartz.org/

SETUP

ssh -X into the pi,  bring up lxterminal,  migrate to the CW KEYER software APP FOLDER bin, by…

brief testing and comparing MP3 to OPUS from a CASTER.FM free online Radio Station setup and the iCW MUMBLE Server/client setup

a Raspberry Pi 4 is doing the transmitting to both MUMBLE INPUT and the RADIO STATION INPUT

unixCW is providing the APP to send repeating text files at different speeds and at…

This method uses 3Khz VLF RF CW over ip that is encrypted & stealth modulated

using MicroModulation methods to encode stealth, LiVE text messaging data onto an a VLF 3kHZ AM CARRIER wave .. can't see anything, or hear anything - sounds and looks like a 'dead' carrier wave with nothing on it...

METHODS the secret…

demo of using an iphone as a QRQ CW SonoBus Receiver - to choose & listen to multiple CW TEXT files(up to 18 different text files) being sent by unixCW's CW program from a pi4 'audio over WiFi' Transmitter NOTE: SonoBus, in MULTI-CHANNEL input mode, can send 18 different, individual audio sources at the same time, and the iphone sonobus…

Python QRQ CW Radio Station Receiver - modified from this python script: https://github.com/irsbugs/GStreaming/blob/master/radio_gui.py

sending CW text files on continuous repeat using unixCW's CW program…

custom w3nqn QRQ CW filter

https://imgur.com/zauJdeV

https://imgur.com/fxZoPUz

Rohde's AM Detector Circuit…

TERMINAL COMMAND for sending a CW TEXT file with UNiXCW/cw program (continuous REPEAT)

while true; do (./cw -d hw:0,1,0 -f ur.txt -w 73 -k 48 -t 852 -v 100); sleep 1; done

for unixcw's CW audio output - this script uses the alsa loopback snd-aloop cable(hw:0,1,0) to receive it uses alsa_in -d hw:0,0,0…

https://github.com/gordonjcp/lysdr demo of using LYSDR to demod 3 VLF frequencies at the same time using multiple instances of LYSDR and combing their demod'D audio outputs…