A while back, we were discussing using duck call jigs to make predator toneboards. I got one of River Mallards public duck call toneboard jigs to see if it could make a good predator toneboard. Here's what I found:
I loaded my delrin blank into the jig. I cut the toneboard profile following the exact curvature of the jig from the cork notch to the end of the jig. The jig actually has a blunt end, but you can use your judgement to follow the jig radius all the way to the tip of the toneboard.
On the top of the jig, you can see the Allen bolts and the thumb screw. These pose a problem for me when I cut my tone channel. I use my router table to cut the tone channel. The thumb screw can be replaced with a Allen screw, but the Allen bolts that fasten the top part to the base are a problem. So, I put the toneboard into another jig to cut the tone channel.
Here's the finished toneboard
Now for the real test - how does it sound?? I can honestly say it sounds really good! And I was really impressed with how it sounded right out of the jig. I didn't have any pitch breaks and all of the sounds were there from the high pitch coyote vocals to the raspy bunny distress sounds. I would not hesitate to use this jig for predator calls.