This is just what you think it is, a radio made with an op amp. This is just as accidental and simplistic as my other radio instructable (the 555 radio) and actually made me ask myself if I was just an RF magnet or something. There is only about a handful of parts you need and while somewhat pricey they are all obtainable at Radioshack. So if you feel like making your own simple radio for field reception. This is a good choice (if you've seen my 555 radio instructable you'll bee happy to know I was able to get two decent signals from two stations this time). For those who want to see the 555 radio follow this link here: http://www.instructables.com/id/555-timer-radio/ - otherwise let's get to building!
Step 1: Parts you will need
Alright all you'll need for this project are the following:
x1 LM386 op amp IC chip
x2 1000 microfarad capacitors (any capacitor works but it's louder with these)
x1 100 microfarad capacitor
x1 8 ohm speaker
x1 9 volt battery
x1 project board
some wire (I used about a foot and a half)
optional - a wire parabola (such as a mini fan cage, a colander, etc.)
And that's it. Of course this isn't a crystal clear signal, but I think you'll be surprised how easily you can understand the voices and the music is pretty clear too, there is some minor static but after listening for a while it's barely noticeable.