Long wire to SO-239 50 ohm?
 

wrote:
Anything special needed to make this thing besides the wire and SO-239?

For receive only, a longwire balun. Palomar (sold by Palomar
Engineers) and RF Systems (sold by Univeral Radio) are very good ones.
There are less expensive ones, too, but after a point, you get what you
pay for. Or you can roll your own if you feel so inclined. Plans for
them are not hard to find.

Depending on the length / height of the wire and the front end
characteristics of the radio, a passive preselector might be a good
accessory, also.