brief test to see if QRQ CW at 80 wpm could be PULSE DENSITY MODULATED effectively for transmit/receive on the ULF BAND at 1.784 Khz using very high Q resonant ferrite rod loopstick TX/RX antennas
for more info on PULSE DENSITY MODULATED CW(PDM-CW) please see this playlist: https://www.youtube.com/playlist?list=PLfFan4sDonOfd-46mK93s1v5em5B...
the TICK STREAM, 1 sine wave cycle of 1.784Khz per every 7.5 milliseconds was the 'key' to getting it to key correctly and be regenerated effectively by the ZAMGATE PDM-CW encoder/decoder at 80 wpm: gst-launch-1.0 -v audiotestsrc wave=ticks tick-interval=7500000 sine-periods-per-tick=1 freq=1784 volume=.9 ! audio/x-raw, channels=1, rate=48000 ! audioconvert ! jackaudiosink