My nanoBTS is rattling

I recently received a nanoBTS 165G, which strangely enough made a rattling sound. While it’s a bad sign, as there might be a chance to short out and break the BTS, it’s a super easy fix. Here the insights!

In addition to the three SMA connectors on the outside of the nanoBTS for connecting the antennas, it also has three internal connectors on the PCB,

nanoBTS PCB

The connectors contain a small metal ring, or well, they should.

Ring No Ring
Socket with ring Socket without ring

So ideally, after opening the nanoBTS’ case you should find a small, loose metal ring on the inside.

Ring

Simply place it on the connector and firmly press it down. Fixed!