March 2022 Blog Posts (3)

QRQ CW Raspberry PI QSO SFU Server for up to 8 OPs using Gstreamer TCP SERVER and UDP Receiver setup

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

   - at the 'Watch on YouTube' website

             for more info on this setup

Added by Chuck aa0hw on March 31, 2022 at 9:52am — No Comments

VLF Receiver - using the KK7B High Performance Direct Conversion Receiver & sound card SDR LO signal

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…

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Added by Chuck aa0hw on March 26, 2022 at 9:56am — No Comments

QRQ CW Tesla Coil with FERRITE CORE Transmit Antenna at 75Khz - sending CW at 75wpm - LIVE demo

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…

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Added by Chuck aa0hw on March 7, 2022 at 4:43pm — 1 Comment

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