thought you already wrote one of these Ed? I can see the date says it was posted on 11-18-12, but it certainly reads familiar, and there are 4 and 5 channel
computer radios out there - have been for years. I know because I bought mine over two years ago, used. A five channel digital, programmible, computerized radio; and it's on 72MHz. FM. That right there should tell you how long they've been out.
It's also got all the basic functions you mention, and more.
Don't get me wrong, it's a great thread, but are you sure you haven't already written it?
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