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I use a Q-tip dipped in alcohol to remove the particles that accumulate
inside a female SMA connector. As for deformity in the center conductor, I
don't think there's much you can do for that.

Zack W9SZ

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On Fri, May 13, 2022 at 12:16 PM Roger Need via groups.io <sailtamarack=
[email protected]> wrote:

The # of mating cycles for a NanoVNA will be much lower than that of
commercial grade connectors for several reasons.

- Low-cost Asian connectors are used to keep the cost down
- Users often rotate the centre pin while tightening which "drills out"
the female SMA socket. A telltale sign of this is metal dust on the white
dielectric. (photo attached)

I use SMA connector savers on all my NanoVNA and TinySA devices. (photo
attached)

Roger