uses FLdigi, Gstreamer and VIRTUAL AUDIO CABLEs the virtual audio cables take the CW AUDIO OUTPUT from FLdigi and send it to the OP's soundcard(for CW sidetone monitoring @ low latency) AND sends it over iP to the other CW OP(can use any audio codec via Gstreamer)
one Gstreamer SCRIPT does it all - grabs FLdigi's…
ContinueAdded by Chuck aa0hw on December 24, 2022 at 1:39pm — No Comments
demo of setting up a pi4 to act as an RTSP virtual ham radio ionosphere SERVER that many OPs can connect to for QSO'n or just listening... this setup uses an i/q input above and below ZERO POINT by about 80 Khz worth of RF SPECTRUM - to gather together and QSO uses the gSTREAMER wavpack codec, and a gstreamer…
ContinueAdded by Chuck aa0hw on December 17, 2022 at 2:09pm — 1 Comment
demo showing unixcw/CW sending 8 different CW Text files at 60 wpm to a pi4 QUISK SDR, using sonobus on the pi4 to send QUISK SDR demodulated output to the iphone sonobus// iphone using REALvnc to choose which pi4 QUISK SDR VLF SIGNAL to demod and listen to
UNIXCW CW…
ContinueAdded by Chuck aa0hw on December 17, 2022 at 10:10am — No Comments
brief demo using the sound card SDR modules from RECRI KEYER to downconvert 5 VLF CW signals from 16Khz to 20Khz converted/mixed down to CW audio at 700 hertz
Added by Chuck aa0hw on December 15, 2022 at 9:30am — No Comments
brief demo showing the REMOTE Pi4 VLF TRANSMITTER setup and a laptop soundcard SDR receiver using its own FERRITE LOOPSTICK ANTENNA to pick up the VLF signal from the remote PI's transmitter's loop antenna located in the other room
soundcard SDR modules are from RECRI KEYER…
ContinueAdded by Chuck aa0hw on December 12, 2022 at 1:45pm — No Comments
demo uses TRIGGER MIDI MONO as a DE-Qer
TRIGGER MIDI MONO analyzes the input volume peaks of the HIGH Q CW elements then sends out a MIDI NOTE on/off message to a software midi input CW KEYER app like RECRI KEYER - https://github.com/recri/keyer (or…
ContinueAdded by Chuck aa0hw on November 18, 2022 at 9:56am — No Comments
instead of sending a solid keydown of dits & dahs... when you key down using this method, only the smallest possible pulse width of the minimalist pulses per CW ELEMENT train, at the CW RF frequency of interest, is sent... saving battery power since the PWM key down is a tiny percentage of battery current/power being used when compared to…
ContinueAdded by Chuck aa0hw on November 15, 2022 at 9:37am — 2 Comments
THE zamgate PLUGIN, in sidechain mode, does the DE-Q'n
ZAMGATE analyzes/measures the incoming high q wavefront of the QRQ CW and regenerates a NEW QRQ CW Note with adjustable weight and rise/fall times
Added by Chuck aa0hw on November 13, 2022 at 6:48pm — No Comments
The tuning of the biploar tesla coil for 16Khz is quite sharp but dramatically increases the transmitter signal antenna output - the RX ferrite antenna is also tuned by a parallel cap (TRANSMITTER is a Linux laptop, RECEIVER Is a pi4) both antennas are using SOUND CARD SDR software modules from RECRI KEYER... to be able to send and receive at…
ContinueAdded by Chuck aa0hw on November 11, 2022 at 11:30am — No Comments
qrq cw from a CW KEYBOARD by RECRI KEYER on a RASPBERRY PI 4 to a Behringer UCA222 to a CLASS D AMP to the FERRITE RODs ANTENNA ARRAY
Added by Chuck aa0hw on November 9, 2022 at 3:51pm — No Comments
demo of a DC & Single conversion ULF BAND CW sound card SDR Receiver - @1.3Khz
sdr MODULES from RECRI KEYER https://github.com/recri/keyer
the single conversion setup uses a SIDECHAIN GATE to allow the PEAKS of the ULF 1.3Khz CW received by…
ContinueAdded by Chuck aa0hw on November 8, 2022 at 10:54am — No Comments
brief test to see how well an old ancient ipad2 can handle/perform... the task of being a remote monitor screen for typing on a software CW KEYBOARD that is resident on a Raspberry Pi 4 CW KEYBOARD setup(by recri keyer) https://github.com/recri/keyer
the ipad2…
ContinueAdded by Chuck aa0hw on October 29, 2022 at 9:05am — No Comments
this video is a follow video - from the 2 previous videos here on this topic:
in this video the same setup as in the 2nd video above is used…
ContinueAdded by Chuck aa0hw on October 27, 2022 at 8:58am — 2 Comments
pi4 is operating as a CW Keyer, using a TLC555 that is keyed by external KEYERs, the CW is recreated into a NEW CW NOTE inside the pi4...at NEAR ZERO LATENCY - also.... it is operating as an Midi CW ip TRANSCEIVER for a full duplex, 2-way CW QSO over the internet
GSTREAMER is providing the code for the ip CW…
ContinueAdded by Chuck aa0hw on October 20, 2022 at 10:23am — No Comments
REMOTE AUDIO over ip by PYTHON/gstreamer/ pi2b TCP SERVER and pi4 TCP CLIENT to SEND transmit AFCW TO RIG and receive audio from RIG on the REMOTE
OPs pi4 station pi2b is using ALSA in the PYTHON SCRIPT AFCW KEYING SETUP - uses the RECRI KEYER cw and sdr apps…
ContinueAdded by Chuck aa0hw on October 20, 2022 at 8:13am — No Comments
CARLA on this raspberry pi 4 is using the ALSA AUDIO ENGINE, with a USB SOUND CARD(Behringer UCA222) 48Khz sample rate, 3 periods of 64 buffer frames - for lowest possible latency for this operation https://kx.studio/Applications:Carla
CARLA is using 1 lv2…
ContinueAdded by Chuck aa0hw on October 15, 2022 at 8:37am — 2 Comments
QRQ CW test comparing the sound of symmetrical raised cosine CW NOTEs with asymmetrical exponential CW NOTEs
Added by Chuck aa0hw on October 12, 2022 at 9:30am — No Comments
using a modified PYTHON SCRIPT from: https://brettviren.github.io/pygst-tutorial-org/pygst-tutorial.html this video shows a send & receive CW to and from the RIG PI INTERFACE example... by RiG/Pi TCP SERVER(pi2b) & REMOTE LAPTOP…
ContinueAdded by Chuck aa0hw on October 5, 2022 at 7:56am — No Comments
pi2b is really too weak for this kind of work... however, pi2b is tested anyway to see how it would perform under the stress.
- a pi4b does quite well at this though, using the same setup....
once setup , CARLA is able to save not only all the APPs and their positions, but also the wires that connect…
ContinueAdded by Chuck aa0hw on September 29, 2022 at 8:49am — 5 Comments
TEST sending CW MiDi over iP using Gstreamer from 20 wpm to over 100 wpm
create a single SINE WAVE or a single CW AUDIO NOTE using Audacity save as a WAVE FILE...
import into Polyphone Soundfont Editer…
ContinueAdded by Chuck aa0hw on September 21, 2022 at 10:16am — 1 Comment
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