QRQ CW @77.5 WPM on the LF band @77.5Khz using a homemade DCF77 Hi-Q Ferrite Bobbin Core RX Antenna

[Chuck aa0hw]

brief demo of QRQ CW on the LF BAND @ 77.5Khz using soundcard SDR modules for both the TRANSMITTER and the RECEIVER from RECRI KEYER https://github.com/recri/keyer

FERRITE BOBBIN CORE HI-Q antenna 1.8mH, with about .002uF cap across the 2 ends of the core winding - to bring it to peak parallel resonance at 77.5Khz

NOTE: SOUNDCARD SDR - must have a minimal sample rate of 192Khz