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Joe Kuter - Posted - 09/29/2009: 11:31:22
I'm building my first Biscuit Resonator. Did a exhaustive search on the web to learn what options were available for the Biscuit/Bridge. The coolest one was made entirely from carbon fiber ($27 +$10 shipping). Seemed like for this application, fiberglass would work just as good as carbon.
Fiberglass is much easier to work with. Some sort of diamond files would be needed to cut string slots in the carbon. Also, the dust from carbon fiber is considered a carcinogen.
Purchased a 6X9 piece of copper clad printed circuit board material 1/16" thick. Used part of the stock for the biscuits and epoxied the rest back to back (copper side out) to fabricate the bridge - this produced a 1/16" biscuit and 1/8" bridge.
I cut a slot about half way through the biscuit and used a few drops of epoxy to secure the bridge. The assembly was rock solid after the glue set. Drilled and tapped a hole through the biscuit and bridge for a 4-40 screw.
The cover plate blocks all side views so it appears that the entire assembly is made from copper. The polished copper adds a little bling to the noodle strainer cover plate.
The guitar isn't finished, but I'm happy with early testing results. I seems to convey a ton of energy from the strings into the cone.
For the pickup, I purchased some piezo elements for about 50 cents each. Used a small diamond burr in a Dremel tool to drill a hole in the center. The pickup is attached with a nylon screw that goes through the cone and threads into the biscuit/bridge assembly. Small fiber washers were placed on each side of the piezo element.
It works great giving a near perfect representation of what's going on in the cone.
The cost for all of the components ended up to be just under $2 per guitar
