GenRad 874), and they were generally not very good
either. For an
early try, they are not bad at all, and in many cases work fine. They
are easy to use, can deal with a good deal of power, and are very
rugged.
Interesting that most amateur radio equipment still uses them as
standard. I have an IC-706MKIIG (two antenna connections: one for HF +
50MHz, another for 144 and 440MHz) with a pair of SO-239. I don't remember
any rig with N connectors on the back, although I'm pretty sure I've seen
it. In other side, it is not hard to find antennas with N-female
connections, even because they are waterproof (!). My GP-98 has a N-female
on its butt.