I've done a little reading and it seems like the Palmers Hoot Tube is one of the best hooters to blow? I have a friend who has one and I've inspected it down as far as I could. One thing I noticed on this particular call is it has a double sound chamber in the exhaust. However; the sound chamber is in the 7/8" diameter range? Some custom call makers prefer to leave the exhaust end open; some prefer to throttle down with the ¼" hole. I wonder if a ½" bore in the exhaust end with a double sound chamber would work? Would it be too constricted by a ¼" hole or better served with an open ended bore? Just some things to play with when I get home and contemplate. I'll head off to Lowes and get some cheap Poplar stock and make it round. Just want to say this has been a helpful thread and thanks to all the contributors... even though I'm no closer to a hooter call, I have a better understanding.
Jeff
Mutt Game Calls