An antenna connected to the MCX port of the Nooelec Nano RTL-SDR tends to flip to either side. This holder keeps it upright.

The holder comes in two versiones:
(a) For connecting the Nano directly to the USB-A port of a PC or (by a stiff USB-A to USB-micro/USB-C adapter) to a mobile
(b) For connecting the Nano via a USB cable (perferably with Ferrite filter, see pictures) to keep the antenna outside of the noise cloud around the PC or mobile

This version assumes the use of the angled MCX-to-SMA adapter as supplied by Nooelec and an antenna with a SMA connector. It may require redesign to fit an antenna with a MCX connector e.g. as supplied in one of the Nooelec Nano kits.

Caveat: The Nano gets quite hot which pushes PLA stability to its temperature limit. Installing the heat sink may not help as the Nano gets hot to keep the quartz at a constant temperature. With the heat sink the Nano may simply dissipate more energy (and drain e.g. a mobile's battery quicker).