The SMA connectors on the TinySA? were never meant for hundreds of connect/disconnects and will wear out eventually especially if the center pin is allowed to rotate and "drill out" the SMA jack. A good way to protect your device is to use "connector savers". Once they wear out you simply replace them with new ones. There are several places you can buy them online. I purchased mine on eBay from a Chinese seller for about 8 USD (including shipping).
I bought mine here ... ;var=464095337588&_trksid=p2057872.m2749.l2649
If you want better quality (Amphenol) and 2 day delivery order from Digi-Key ....
Roger Need