Any of you using them for predator calling? What do you got? How do they work? This past Friday night I used the instructions on Varmint Al's web page to build an electronic caller. Quite impressed with the sound, won't get a chance to test it until the weekend. I'd post pictures, but since I used the same parts list as Al mine looks identical to his, well except for the MP3 player, I had an old one laying around. http://www.varmintal.com/coy5-20.htm I downloaded Al's MP3's and found some others on the web. I did use it to wake up my daughter Saturday morning. Nothing like the waking up to the sound of a dying rabbit on full volume. It drove the dogs nuts. They were stuffing their noses inside the speaker horn trying to figure out what was making the noise.