SDR Dongle Upright Antenna Stand
A weighted 90 mm base with a 55 mm tall sleeve that holds a USB SDR dongle (anything up to 32 x 17 mm in section) upright, so a telescopic whip on the MCX/SMA end can't pull it over. The USB extension cable's socket sits on the desk inside the open-bottom sleeve and leaves through an underside trench. An M3 heat-set insert takes a nylon thumbscrew that clamps thinner dongles. Three 4.5 mm holes let you screw the base to a shelf.
electronics rtl-sdr antenna sdr-dongle