Use Pintail Waterfowl's toneboard jig to make a duck call insert
When making a duck call, a toneboard is used to create the sound of the call. This can be accomplished by using a premade insert or my making a custom toneboard. The difference is a custom made toneboard allows for a more unique sound. You can tweak and tune it to get just the right sound.
A custom jig (or public jig as pictured) makes the process of constructing a custom toneboard that much easier. The toneboard is started on a lathe and turned down to a 5/8" diameter. A hole is then bored through the center of the piece. The piece is then inserted into the toneboard jig then locked in using the set screw. A saw is then used to cut the "arc" and the notch. The notch is where a piece of cork will hold the reed(s) in place. After the basic cutting is done, a file is used to fine tune the arc to get the desired sound profile.
It's that simple. Having a custom toneboard jig can really speed up the process of making toneboards and making them consitent.
There are two types of jigs available. Compltely custom jigs which can run upwards of $250 to have them made and public jigs, which are a custom jig made over and over, which call makers can purchase and then fine tune it to their liking.
This jig is availale online from Pintail Waterfowl, http://www.pintailwaterfowl.com