I have recently been givin a brooder that was my friends mothers when she had a farm 40 years ago (so he says) It works like a champ Problem is I cannot figure out how to adjust them temp control. Here is a picture of an exact model of mine. http://farm4.static.flickr.com/3478/3719578450_abdbf20b55.jpg if anyone has experience with these I would Love your insight thanks.