I may have written that article...mine was published in 1994 ( http://mail.blockyourid.com/~gbpprorg/2600/2600_11-2_Page_18... ). Another one had been printed in 1989, and then another in 1988. I mentioned that Radio Shack had the scanners in my article, but suggested people look around for better bargains.
The 800 MHz radio shack scanners at the time had some kind of daughterboard that blocked scanning cellular frequencies, but there were instructions on the Internet of how to get in there with your soldering gun and dike it out, and get access to that bandwidth. I later learned from a Radio Shack manager the undocumented key punch sequence that bypassed the daughterboard, so you could scan cellular without going through all that trouble.
The 800 MHz radio shack scanners at the time had some kind of daughterboard that blocked scanning cellular frequencies, but there were instructions on the Internet of how to get in there with your soldering gun and dike it out, and get access to that bandwidth. I later learned from a Radio Shack manager the undocumented key punch sequence that bypassed the daughterboard, so you could scan cellular without going through all that trouble.