Many years ago, I worked in a calibration lab, and after (actually) ranting about how crappy a connector an "F" type was, I tested one to make a point.... and the damned thing was very clean. Weird. And, they're very easy to put together, relative to BNCs, for example. That the electrical characteristics are almost identical to BNC connectors is something I still don't quite understand, although I believe the instruments... (all HP equip. <Grin>)