Backs and tops sanded
The soundboards, backs and sides are now sanded to their respective thicknesses.
They will be stored on the high shelf in my permanently heated workshop until needed.
The soundboards, backs and sides are now sanded to their respective thicknesses.
They will be stored on the high shelf in my permanently heated workshop until needed.
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This is the very start of building an instrument. The backs come to me usually in two or three pieces, (though I have made up to six piece backs). Two piece backs are straightforward, but for the three piece backs I have to decide on the best proportion of centre to outside strips and this can depend on what I have to work with.
Here I’m joining five African Blackwood backs, only one of which was wide enough for a two piece, the rest all being three piece. It can take a while to decide which is the best arrangement to make the best possible use of the wood in hand, and no two backs end up identical.
But it’s lovely wood to hold and to work with, and makes wonderful sounding guitars. Having two or three piece backs makes no difference to the sound, this is entirely dependent on the quality of the wood.
I’m also joining five figured Sitka soundboards, all of which are two piece; it’s unusual for soundboards to be more than two piece.
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Here I’m dressing the joint edges of a soundboard with a router on a specially built jig. Both halves are in the jig, so both are dressed at the same time, ensuring a close joint.
The clamps used below are aluminium. Not designed for heavy use, they are capable of more than enough pressure for this job and their light weight is easy on the joined boards when moving them around.
Sorry,no photos of binding or neck fitting and shaping, but binding photos can be seen on my earlier News Page 10, items dated 29 and 30 July 2010. Neck fitting and shaping photos can be seen on News Page 12, items dated 24 and 25 April and 2 May 2009.
Here the fingerboard is glued and clamped to the unshaped neck. Lots of clamps, not for lots of pressure but to clamp even pressure everywhere.
Now a jump to the instrument ready for lacquer. You can just see the tape over the soundboard area that will be covered by the bridge; after lacquering, this is removed so the bridge can be glued onto bare wood. You can also just see some of the side dots on the fingerboard, showing this instrument to be left handed.
Now it goes to Dave Wilson. He will have it for around a month, spraying and rubbing down several coats. It will come back gleaming.
Despite my age, it appears I’m still innovating. After 20 years fitting necks using my current technique, today I made a mistake I’ve never made before. Fortunately not too serious.
With the back trimmed, it’s time to fit the side reinforcements. Here they are glued and clamped.
Finally the back and sides are complete, lightly lacquered, ready for final trimming of the lining and final adjustment to receive the soundboard.
And here is the soundboard glued and clamped.
While the glue is drying is a good opportunity to work on the neck. Here the head has been cut to shape, had its veneer added and the tuner holes drilled. The rough heel block is glued and clamped.
I have to scribe the curve of the soundboard onto the sides, so it fits without being distorted when glued and clamped. It’s important to do this accurately, as modifying the fit later is fiddly and time consuming, involving taking wood off, testing, and repeating as necessary.
Here is the scribed line, drawn in white pencil to show up on the dark wood. I trim off the area above the line, then check that the soundboard is a good fit. Then I’m ready to add the top lining. This has been bent on the heated bender and left to dry overnight. The ends of the back braces will be routed away and covered by the binding.
Fitting, gluing and clamping the lining is the same as for the back lining.
Here is the latest on the guitar – bouzouki build.
After gluing the heel and tail blocks yesterday, today I scribed the curve of the back onto the sides and cut them down. This means the back will fit onto the sides neatly without having to be pulled down.
The lining has already been bent to shape on the bending iron, just as the sides were. Now I partially shape them and glue them to the sides. The lining will give gluing area when I glue the back to the sides. Here they can be seen clamped while the glue dries.
And here are the sides with linings glued and ready to smooth and trim.
Cody from the US says he’d like to see more in my News page about what goes on in my shop. So OK Cody, here goes.
Currently I’m building a guitar-bouzouki for an Irish musician. He plays accompaniment and tunes, so I’m building it octave mandolin scale, which will suit it to both. He will tune it GDAD.
Back and sides are African Blackwood, the soundboard is figured Sitka. It should be a great instrument. The full scale guitar-bouzouki has 16 frets to the body, so this shorter scale instrument will have 14.
This musician already has two of my instruments, so is familiar with my work.
Here the braces have been shaped and glued in place, the go bars having been removed from the bottom two braces.
African Blackwood varies. Some bends easily on the heated bender after light damping, some less easily. After an hour soaking, these sides still felt like iron so I left them to soaking overnight and the next day they were fully cooperative.
After bending on the iron, I clamped them in the mould and left them on the top of the stove for another night.
When the sides came out of the mould, they retained their shape perfectly, so can be built into a guitar creating a minimum of stress.
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Here is the back, with outline and brace positions marked, having the centre join reinforcement glued in the go-bar jig. The decorative centre strip can be seen at the end of the reinforcement.
It’s my understanding the go-bar jig comes from Japan via the US. So useful, it simplifies all sorts of gluing procedures and makes cleaning up much easier than working round clamps.
I have colour coded the different bar lengths, each length living in a separate compartment by the side of the jig.
Here the soundboard braces are gluing. It looks a bit of a forest, but there isn’t too much force being used, just a lot of bars to spread the pressure.
Always interesting when a guitarist comes to collect his guitar. Today it was Mark Dennis collecting his Mark 3 Martin Simpson model, identical to the one Martin himself plays.
Mark and Vanessa showing how disappointed they are.
Mark already has one of my earlier guitars. Both he and partner Vanessa commented on how different this one sounds and how much they liked both guitars. After playing it for an hour or so, Mark returned it to its case, looked at it, and said ‘That is fantastic’.