Information about the 472 kHz (or 630 m) ham band : http://www.472khz.org/
Oscilloscope Video Monitor : http://tubetime.us/index.php/2011/03/29/oscilloscope-video-monitor/
Djanibekov Effect : https://youtu.be/1n-HMSCDYtM
RF Generator by F4HUY : http://www.f4huy.fr/?p=1374
DGPS (Differential Global Positioning System) Beacons by DJ9EV : https://www.dj9ev.de/dgps/
3D, moulage, fonderie, cornet, Investment Casting using 3D printed model : https://youtu.be/Lb76R_f7ogY
A Topfkreis Antenna by PYZBZ : http://www.qsl.net/py4zbz/antenas/tofkreis.htm
Power Meter by the ElectroBidouilleur : https://youtu.be/OHtSjbJd7T4
EI3KD works Cape Verde on 144 MHz : https://ei7gl.blogspot.com/2018/08/ei3kd-works-cape-verde-on-144-mhz-to.html
Inside a huge PCB factory in China by Stranges Parts : https://youtu.be/ljOoGyCso8s
Recommendations for receiving Es’hail 2 : https://destevez.net/2018/12/recommendations-for-receiving-eshail-2/
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