SobellLogo3
  • News
  • Instruments
    • 40th Anniversary Model Guitars
    • Flat Top Guitars
      • Steinbeck Model Guitar
      • Martin Simpson Signature Model
      • New World Guitar
      • Model 4 Dreadnought
      • D Guitar
      • Verona Guitar
    • Arch Top Guitars
      • 6 String Arch-Top guitar
      • Twelve string Arch-top
    • Citterns and octave mandolins
    • Mandolins & Mandola
  • Construction and Design
    • Wood
  • Available now
  • About Us
    • Contact
    • How I started: my first cittern
  • Things they say
  • Order
  • Tonewood for sale
    • Indian rosewood for sale
    • Brazilian rosewood for sale
21 Mar2020

Reinforcing back joints

 

 

Today I fitted cross-grain spruce reinforcements over the two back joins of a three piece back.  These are light weight and sanded to a smooth curve before fitting.

Here they are glued and clamped in the go-bar jig.  The spruce comes from soundboard off-cuts and is never long enough to cover the whole join. So each join is reinforce by two strips, one from the heel to the 4th brace, and the other a much shorter strip from the 4th brace to the tail. The join will be cut away to receive the brace, so even were that area visible through the sound hole, there would be no join to see.

16 Mar2020

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.

14 Mar2020

Joining backs and soundboards

.

 

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.


Three piece backs with joint faces dressed, glued and clamped. The decorative strips are red, gold and green with rosewood centre.

.

 

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.


Jig and router for dressing join faces


Three piece back joined, this one with MS model red and white with black Rocklite centres


All five soundboards glued and clamped. The glue dries in an hour or so, but I leave them overnight to be sure.

12 Mar2020

Ready for lacquer

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.

 

 

02 Mar2020

Still learning

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.

20 Feb2020

Back and sides complete

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.

16 Feb2020

Back and sides nearly complete

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.

 

13 Feb2020

Fitting the back

Adjusting the sides and lining so the back fits perfectly is a time consuming job. Here are back and sides adjusted and notched to receive the back braces.

The back will fit perfectly, without having to be pulled down by clamps.  The clamps will only glue it on.

 

Back glued and clamped.

11 Feb2020

More on guitar-bouzouki build

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.

Before preparing sides and lining to receive the back, I started on the neck.  I routed a channel for the truss rod, then prepared and glued the head stock onto the neck.  Here it is glued and clamped.

10 Feb2020

Workshop activity

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.

.

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.

Here are the sides, joined with heel and tail blocks, the back and the soundboard.

 

  • 1
  • ...
  • 8
  • 9
  • 10
  • 11
  • ...
  • 18
  • News
  • Instruments
    • 40th Anniversary Model Guitars
    • Flat Top Guitars
      • Steinbeck Model Guitar
      • Martin Simpson Signature Model
      • New World Guitar
      • Model 4 Dreadnought
      • D Guitar
      • Verona Guitar
    • Arch Top Guitars
      • 6 String Arch-Top guitar
      • Twelve string Arch-top
    • Citterns and octave mandolins
    • Mandolins & Mandola
  • Construction and Design
    • Wood
  • Available now
  • About Us
    • Contact
    • How I started: my first cittern
  • Things they say
  • Order
  • Tonewood for sale
    • Indian rosewood for sale
    • Brazilian rosewood for sale