I've been wanting to do this project for a long time and can't believe I haven't before now with how easy and cheap it was. I have a about $35.00 into this very basic caller.
Parts List
Radio Shack #227-1008 Mini Amp
Radio Shack #400-1440 4"x6" Power horn.
Radio Shack #420-2420 cable, 6' long with 1/8" male mono plugs at each end.
Radio Shack #420-2434 cable, 6' long with 1/8" male plug on one end and stripped at the other end.
Ammo can
Here's a link to some free MP3's I've found on the internet and decided to host them here so they'd always be available. Right click and "save as" to download.
http://www.waterfowlforum.net/audio/coyote/First thing is to mount the horn to the ammo can. I mounted it on the side of the can. At this step I've also ran the horn cable into the can.
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Next we need to solder the horn cable to the 1/8" audio cable you bought (Radio Shack #420-2434) I also used heat shrink here to keep the +/- of the cables apart and to provide weather proofing.
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Time to put the amp in the can. I just velcroed it in there so it'd be easy to remove to replace the 9V battery. The MP3 player will also be valcroed in there, this picture really shows how simple this caller is.
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All that's left to so is add a camo paint job. I'll be testing the caller this weekend and will post back how well it worked, so far when I tested it with some music it was loud enough to get my boss out of his office to see what was going on
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