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PostPosted: Tue Oct 02, 2018 6:11 am 
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First name: colin
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Results of an experiment with a thin/light soundboard with narrow/tall lattice type bracing on a steel string, inspired by a Greenfield video and made for myself,.
Top is sitka at 1.9-2.0mm thickness, lattice/triple X braced, with soundhole doubler, large bridge plate is spruce/EIR laminate, live back.
The bracing pic is before final brace profiling, they ended up a lot more delicate and almost triangular, but were difficult to get in to with a chisel! Ended up roughing out with a Dremel.
Lucked out with coupled resonances, came out reasonable with body at 89hz, top at 189hz, back very weak at 235hz.
Bridge rotation is 1.8 degrees.
Sound is subjective of course, but it is loud, with strong basses and trebles, and sustains well, although not played in yet of course. I'll be looking to local players for their opinions, but I'm pretty sure I will be making more with this top/bracing type combo.
Myrtle/Sitka, Ebony fretboard and bridge, Sapele/Idigbo neck with Bubinga bindings and headplate.
Finish Enduro Var Satin.
Neck is 48 mm at the nut, 650mm scale (25.6"). 410mm lower bout, 310 mm upper. (sort of medium Jumbo/GS size)
Attachment:
Bracing.JPG

Attachment:
Front.jpg

Attachment:
Back.jpg

Attachment:
Finish.jpg


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Last edited by Colin North on Thu Oct 18, 2018 4:48 am, edited 7 times in total.

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PostPosted: Tue Oct 02, 2018 6:25 am 
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Looks great! May I ask what finish you chose for it ?


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These users thanked the author SnowManSnow for the post: Colin North (Tue Oct 02, 2018 6:59 am)
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PostPosted: Tue Oct 02, 2018 6:32 am 
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It's the satin endurovar. :)

Colin, that finish is right off the gun, no? Impressive.

She's a beaut!

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These users thanked the author bcombs510 for the post: Colin North (Tue Oct 02, 2018 6:59 am)
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PostPosted: Tue Oct 02, 2018 6:40 am 
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I appreciate folks willing to take risk and experiment!

Cheers, M



These users thanked the author Michaeldc for the post: Colin North (Tue Oct 02, 2018 6:59 am)
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PostPosted: Tue Oct 02, 2018 10:59 am 
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Wow! That's a thin top for what looks like a fairly big guitar. What Michael said!

A couple questions.

Is the lower end of the X let in or free floating?

Is the lattice notched and capped? It's hard to tell from the pic.

Live back? Other than leaving it ridiculously thick, I'd be interested in hearing your thoughts on achieving this.

It looks like a lovely guitar Colin. Wish I was a little closer for a test drive!


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Danny


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PostPosted: Tue Oct 02, 2018 2:36 pm 
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Lower end of the main X
is let in.
Is the lattice notched and capped?
Yes, it is, at the 4 intersections
Live back? Other than leaving it ridiculously thick, I'd be interested in hearing your thoughts on achieving this.
A live back is just one where it's resonant frequency is close enough to couple effectively with the top's resonance, in my case about 4 semi-tones higher.
If it's too thick, frequency tends to go too high for is to happen, and the weight tends to make it unresponsive. Its not so unusual for a "normal" guitar to have a live back, if it's not heavily built.
There's a lot to take into consideration - wood's stiffness, bracing height and style, radius of the back. Recommend Trevor Gore's book.
It looks like a lovely guitar Colin. Wish I was a little closer for a test drive!
Thanks Danny, you would have been welcome too.

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These users thanked the author Colin North for the post: DannyV (Wed Oct 03, 2018 8:51 am)
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PostPosted: Mon Oct 15, 2018 11:57 am 
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That's a beauty Colin. It is really nice to see experienced people venture out and try new things! Even better when it works!!!

Hope you post some sound clips.

What is the back and sides? Black Limba?

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PostPosted: Mon Oct 15, 2018 12:13 pm 
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Joe Beaver wrote:
That's a beauty Colin. It is really nice to see experienced people venture out and try new things! Even better when it works!!!

Hope you post some sound clips.
What is the back and sides? Black Limba?


Oregon Myrtle, from Lance.
Thanks Joe, here's my first poor attempts attempts at recording a friend playing, made with a Zoom H1 at my kitchen table.
https://soundcloud.com/stream

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PostPosted: Mon Oct 15, 2018 9:49 pm 
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Love the Myrtle!! Very sharp looking build.

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PostPosted: Tue Oct 16, 2018 4:15 pm 
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Colin, I can't seem to find your clip on soundcloud...

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PostPosted: Wed Oct 17, 2018 2:13 am 
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Not sure why, probably something I've done not being familiar with it.
Try these -
https://soundcloud.com/colin-north-849679653/red-and-black-1
and
https://soundcloud.com/colin-north-849679653/3a-1

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PostPosted: Wed Oct 17, 2018 8:59 am 
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Got it this time Colin. The guitar sounds very nice and I love the playing and the tune!

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These users thanked the author sdsollod for the post: Colin North (Wed Oct 17, 2018 3:56 pm)
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PostPosted: Wed Oct 17, 2018 10:25 am 
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Exc colin , very tastefully done , cheers from KC MO usa



These users thanked the author ernie for the post: Colin North (Wed Oct 17, 2018 3:56 pm)
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PostPosted: Wed Oct 17, 2018 10:32 am 
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Great looking and sounding guitar. Your friend plays well and has a nice voice. Does he play and sing professionally? I also liked the selection of songs. [:Y:]



These users thanked the author Clay S. for the post: Colin North (Wed Oct 17, 2018 3:56 pm)
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PostPosted: Wed Oct 17, 2018 2:38 pm 
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That was a treat, Colin. Thank you for sharing the clips. Sounded great!




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These users thanked the author bcombs510 for the post: Colin North (Wed Oct 17, 2018 3:55 pm)
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PostPosted: Wed Oct 17, 2018 3:55 pm 
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Clay S. wrote:
Great looking and sounding guitar. Your friend plays well and has a nice voice. Does he play and sing professionally? I also liked the selection of songs. [:Y:]

Not professional, but very enthusiastic folk club player and a bit of a collector, 35 instruments so far.

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PostPosted: Wed Oct 17, 2018 4:25 pm 
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The guitar sounds great. Was the Red and Black track played bare fingered or with thumb and finger picks?



These users thanked the author J De Rocher for the post: Colin North (Thu Oct 18, 2018 1:59 am)
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PostPosted: Wed Oct 17, 2018 9:03 pm 
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That guitar sounds great. From the bracing I expected a tighter sound. I guess the thin top took care of that.
Nice work!

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PostPosted: Thu Oct 18, 2018 2:01 am 
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J De Rocher wrote:
The guitar sounds great. Was the Red and Black track played bare fingered or with thumb and finger picks?


Bare naked fingers.
Here's another song, his original composition, which I just edited as he had to retune (and chat)

https://soundcloud.com/colin-north-849679653/runway

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PostPosted: Sun Oct 21, 2018 11:38 pm 
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That;s one sweet sounding guitar Colin

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These users thanked the author Joe Beaver for the post: Colin North (Mon Oct 22, 2018 3:18 am)
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