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Last night I was playing with my ¾” Baltic Birch. What I realized is that my Jew frugality played a bad joke on me.  At this point I do feel that ¾” of plywood is not enough thickness for my 43.5Hz horn. I understand that it will be heavily braced, perhaps each 8 inch but still I do not like it p I would like more substance in the horn skin. If course not only the Jew frugality and my desire to buy less plywood made me to decide for ¾ inch. The weight was a big consideration factor and the fact that 1.5inch wall for instance will minimize the operational, useful volume of my horn’s mouth. Anyhow, now after hours of dealing with ¾” Baltic Birch I do feel that it was a mistake – I need a thicker walls.

Now is the question what can I do? This is complicated as the math for the ¾” is doe and we are pretty much ready to cut the wood. If I glue two of ¾ layers then it will be twice heavier, still I wonder if it makes sense for me to go for it. I have some alternatives that I am weighing now.

1)      Each section between the brace to feel with mixture of send and roofing contrite.  The roofing contrite is tar-like plastic that is wonderful dampening. I might even drop into the roofing contrite some lead shots (I have 800 pounds)

2)      To make colossal amount of bracing, pretty much to built a second layer with 2 x4 that will sit behind the plywood on screws and polyurethane glue.

3)      Discover if exists some kind of heavy-mass construction spray-adhesive (foam) and to damp that foam (perhaps mixing it with sand) into the section between the 2x4

4)      Forget the frugality and reasoning and to glue second layer of plywood to my current 3/4 plywood

I have all options on the table now…

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