Radio Shack PRO-25 scanner mods
I was playing around on the internet one day when I ran across this page dealing with an old scanner I have:
After following the instructions I was able to program in all 50 of the 72 mhz frequencies in use in North America. I now use it before I fly in a local park just to see if my channel is clear. There may be other scanners where similiar mods are possible.