I've been thinking recently about the design I use for my necks, which is currently neck-though, with a recess carved out. As I use homemade boxes with thin lids, I need to accommodate bracing on the underside of the soundboard, throw pickups in the mix and I have a serious weak point. One of my 4 stringers has developed a bow, and I believe it is coming from the recess.
This is the recess cut out for a 3 stringer with a homemade box - this one is still solid but you get the idea of how much material I need to remove to allow for the fretboard standing proud of the soundboard, and also the bracing underneath.
The neck wood I have most easily available is oak, in lengths of roughly 1 metre, here is a proposed design in which the neck is cut and re-glued into supports.
The overlap forming the heel would be maximum about 150mm/6", the blocks underneath would be the same width as the neck, glued to the box and screwed from underneath to the neck - do you think this would be strong enough for a 3 or 4 stringer? (I haven't ventured into truss rods yet, nor do I have a router.) I feel that this needs to be the direction I move in so I can start messing about with resonators etc. without compromising the strength of the neck.
Your thoughts as always would be greatly appreciated.
Thanks Ted - do you think this is a lot stronger? I'm thinking economically - I want to get all of the wood for the neck and supports from one 1 metre blank
have a look at my Youtube videos about canjo construction. They show how i get round this 'challenge' ! mike
I also use quite a bit oak in my builds. Old bed heads are an excellent source of timber, I get nearly all my oak and mahogany that way. I mostly make 3 strings, but the odd 4 I do make usually gets a brace about a foot long.
the link is ..... http://www.youtube.com/results?search_query=mjlyam&sm=3
hope this helps. mike
YOu could always install a head block and to a bolt on neck, a la Fender. You can have a rock solid, adjustable neck with all but the front 2- 2 1/2". Then everything is wide open for bracing or whatever you want. I've been doing this for years without a single neck failure.