I have never had such sma problems. I
Resume the problem was with both connectors and you used a lead ( or a cal standard) known to be ok?
I wonder if the centre recepticle has moved when the connector was soldered to the board and the dialectric is not ptfe ( which would haVe tolerated the heat). If you look directly over the recepticle, you might be able to see the eccentricity of the centre part.
Alternatively the internal diameter of the outer component is out of spec, but that is difficult to measure without specialist tools. You might be able to see tiny scratches in the gold plating of recepticle or attempted connecting device if you look with a magnifying glass, or one of those ultracheap “ microscopes” from China. I have found them invaluable.
With moderate soldering skills, it would not be impossible to replace the sma connectors. I am sure some people will need to do this in a year or so, as the sma connectors will have worn out with heavy use. That is why some put on male to female sacrificial” savers”, or get the more robust N version.
Steve L. G7PSZ
