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- Mackmobile43 Thanks for your responses about the phone network. I can't use any type of computer based system. It has to be portable, battery powered, and small. - GLR Thanks for that idea about the restaurant paging system. I am going to look into that much more. It does sound ideal...

Great idea about the wire. Come to think about it, I now figure I can just yell across that distance. Problem solved! But what about the technology that wireless home phones use? Those are secure. Could I use that type of frequency?

- molecule Thanks for your response. Because I want to keep my little device very simple, I would preferr not to have to change channels at all. So while the FRS band looks good, it is not ideal. What about all the little devices like key finders, and remote control car door locks. They...

Hi Folks, I am a complete radio knob and need your expert help with a project. I need to figure what radio frequency is the correct and legal one to use for something I want to make. Basically I want to have two hand held FRS type radios that have the Call function, and nothing else...