Can the venerable 9:1 matching transformer (for matching a 500-ohm
random wire to a 50-ohm coaxial cable) also be used the inverse way,
that is, to match an incoming 50-ohm coax to a radio whose only
connection is a Hi-Z pair of screw terminals?

Further on, is there any reason why such a matching transformer could
not be installed inside said radio behind the screw terminal strip so
that a permanent SO-239 could be connected and mounted on the radio
chassis?

Thanks,
Bruce Jensen