Better: unscrew the antenna and screw in a matched termination/load instead. This will protect the amplifier inside (HF reflections due to a miss match could fr

Better: unscrew the antenna and screw in a matched termination/load instead. This will protect the amplifier inside (HF reflections due to a miss match could fry it with overloading the transistor), and be an even worse antenna compared to an open SMA (or such) connector.