SMCWUSB-G (Ez Connect 802.11g Wireless USB2.0 Adapter)

This adapter is based on the ZyDAS ZD1211 chipset.

ZyDAS has been bought by Atheros, and any official support or development on the Mac OS X drivers was halted.

Nevertheless, you can get the drivers here.

I can confirm them to be working OK in PowerPC machines running 10.4.9 (Tiger), since my mini is currently hooked up via one.

Although the RF circuitry isn’t designed to handle a 2dB antenna, you can get a significant range boost via a very simple hack: just take 1.5cm (or so) of solid copper wire to form a little rod and solder it to the PCB antenna on the designated spot.

Make absolutely sure that you have enough of a connector surface to lend mechanical resistance to the join - otherwise, a lateral pull on the copper rod will tear the PCB along with the solder.

Finally, cut a small hole on the casing to let the wire protrude:

If you picked the right gauge wire, the antenna connector will grip the wire tightly enough to hold the whole assembly together:

Nevertheless, you might want to consider dabbing the connector with one or two drops of glue (with a glue gun) to make sure there is enough mechanical resistance to avoid tearing the PCB - especially since the weight of the antenna connector alone is far greater than the SMCWUSB-G’s.