Just finished this headless semi-hollow seven-string

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Just finished this headless semi-hollow seven-string

Postby Michael Sankey » Tue Jun 05, 2012 9:43 pm

I'm really happy with the way this one turned out. Believe it or not, this is actually the second headless semi-hollow seven-string guitar I've made. A niche market, perhaps, but I'll take it. The body and neck is black walnut, and the top is actually a beautiful piece of red spruce. It was split on the ends, and hence not long enough for an acoustic, but just right for this one. It uses those ABM single-string bridge/tuner units and a seven-string floyd-rose style locking nut. The pickups are p-90 size Lace Alumitones. These are stupendously good. I highly recommend them.
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Re: Just finished this headless semi-hollow seven-string

Postby Michael Sankey » Tue Jun 05, 2012 9:50 pm

I made deep bevels around the edges for comfort. This bit at the upper bass bout exposes the chambering to act as a kind of soundport. There is a set of Schatten thumbwheel controls (master tone and volume) peeking out of the edge too.
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Re: Just finished this headless semi-hollow seven-string

Postby Michael Sankey » Tue Jun 05, 2012 9:58 pm

Here's another neat thing. The client came to me with the idea of using Rick Toone's patented Trapezoid Neck Profile™ (TNP™) . I've always been an admirer of Rick's guitars, and was keen to try it out. It works quite well. The unusual shape is less intrusive than you might think, since you generally either keep your thumb flat on the back, or anchor it against one of the facets for extra leverage while bending strings. I quite liked it. I have yet to hear if it lives up to the clients expectations.
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Re: Just finished this headless semi-hollow seven-string

Postby Tim Douglass » Wed Jun 06, 2012 2:44 pm

I like that a lot, Michael! I would like to see a better shot of the back of the neck and how you worked the volute in there.
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Re: Just finished this headless semi-hollow seven-string

Postby Henrique Schneiter » Wed Jun 06, 2012 4:12 pm

That's definitely inspiring and refreshing design. Great job man! And yes, more pics please!
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Re: Just finished this headless semi-hollow seven-string

Postby Jason Rodgers » Wed Jun 06, 2012 8:46 pm

That is a gorgeous piece of work! Like a re-imagining of a Klein, but with bold brush strokes and more elegant lines. More, more, more pictures, please- particularly in-progress construction. And tell more about the neck and those pickups. Wowee!
-Ruining perfectly good wood, one day at a time.
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Re: Just finished this headless semi-hollow seven-string

Postby Michael Sankey » Wed Jun 06, 2012 9:15 pm

Glad you like it. Here's a shot of what it's like inside. Long neck tenon, chambers on both sides. The pickup routs were done after, and connected the chambers.
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Re: Just finished this headless semi-hollow seven-string

Postby Michael Sankey » Wed Jun 06, 2012 9:19 pm

I don't have another shot of the volute, but here you can see a little more of the neck and the back.
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Re: Just finished this headless semi-hollow seven-string

Postby Terry Mashek » Thu Jun 07, 2012 10:42 am

Wow! Not much traditional about this guitar at all. My tastes usually run to the more orthodox designs, but I'm curiously drawn to this one. Great job!

Still not sure about that trapezoidal neck, though. :)
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Re: Just finished this headless semi-hollow seven-string

Postby Jason Rodgers » Thu Jun 07, 2012 2:27 pm

Cool stuff.

Terry Mashek wrote:Still not sure about that trapezoidal neck, though. :)


I'll agree, it doesn't seem like that should feel right. Looking at Toones's website, though, the pictures of a hand in different playing positions makes it look like not too far if a leap. Is your neck licensed? Or do you actually have to use Toones's measurements and height/width ratios to be inside the patent? How did you machine the facets?
-Ruining perfectly good wood, one day at a time.
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Re: Just finished this headless semi-hollow seven-string

Postby Michael Sankey » Thu Jun 07, 2012 5:24 pm

Hi Jason. Yes, it is licensed. And you are free (encouraged, actually) to adjust the proportions to your taste. One advantage is that you get a little extra stiffness for a given neck thickness, because there's more wood on the back of the neck. In practice the limit to the thinness of the neck is the truss rod.
It was quite easy to make. Just like all my necks, I rough out the contour at the ends with a rasp, and then carve away the waste with a spokeshave.
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Re: Just finished this headless semi-hollow seven-string

Postby Murray Kuun » Fri Jun 08, 2012 6:47 am

Lovely, just up my alley!
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Re: Just finished this headless semi-hollow seven-string

Postby Marko Ursin » Fri Jun 08, 2012 12:20 pm

Very nice looking guitar. Not something that would be played by rock'n'roll guitar heroes on stage but still very nice.
I like Trapezoidal neck profile on bass. I've made two of those and they work just fine. My latest however has round shape and the difference in feel between round and trapezoidal is very small.
Marko
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Re: Just finished this headless semi-hollow seven-string

Postby Jason Rodgers » Fri Jun 08, 2012 3:09 pm

Michael Sankey wrote:Hi Jason. Yes, it is licensed. And you are free (encouraged, actually) to adjust the proportions to your taste.


Hmm, that's interesting. Can we talk about the price of licensing here? Charlie?

In terms of the trapezoid proportions, I'm guessing you choose your neck thickness, but then vary the width of the back flat segment?
Last edited by Greg Robinson on Sun Jun 10, 2012 12:51 am, edited 1 time in total.
Reason: Fixing quote tags.
-Ruining perfectly good wood, one day at a time.
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Re: Just finished this headless semi-hollow seven-string

Postby Michael Sankey » Sun Jun 10, 2012 5:06 pm

That was pretty much how I arrived at the proportions. It's not that different in dimensions to a regular neck.
Rick's website has a section on how to go about getting a license for his various patents, with prices. It's very straightforward. And if you need to know more, he's good about responding to emails.
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