I picked up a fairly new weather radio from Oregon Scientific (Model WR102) at a consignment outfitter recently. Unfortunately, due to my location, I couldn't get any signal using just the onboard antenna. I decided to rectify this situation, and make a detachable antenna for when I needed better signal. Sorry for the picture quality my camera kinda sucks and I can't afford to get a new one at the moment.
Step 1: Materials and Tools
For this project, you won't really need very much.
Small phillips head screwdriver
Soldering iron and solder (if desired, I did not use mine)
several feet of very narrow-gauge wire(I used about 24 gauge)
Crimp-on releasable connectors
External antenna (I salvaged mine from a clock radio)