Before you build "El Cheapo" you might take a look at the Big Horn XL Outdoor Amplified Speaker by Cass Creek. You can find info and buy it here.
http://www.king-cart.com/cgi-bin/cart.cgi?store=apc&product_name=Cass+Creek
I made "El Cheapo". It works and while it was fun to build, by the time I did all the running around to get all the components I had over $100 into the project.
I am sure the amp/speaker combo are better with the CC and the 75 feet of speaker cable you can get some distance.
Just a thought.
Hey thanks for the suggestion. . .I think that I hadn't done enough research on the remote callers. . .I just saw the Fox Pro ones that ranged from $300-$600 and said right off the bat that is way too much for me to spend on a caller. . .especially when I don't even have a rifle right now. . .excluding my 10/22, grew up in Illinois where centerfire rifle hunting is pretty much illiegal state-wide. . .but I've seen some now for down around $100. . .
. . .I'm checking your link out now. . .
Thanks again!!!