Search found 38 matches

by weslewis
Sun Sep 07, 2014 7:04 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Designing 12-string guitars and baritones
Replies: 18
Views: 23773

Re: Designing 12-string guitars and baritones

Pretty simple jig, consists of a recycled fretboard, a movable nut and saddle, which are tapered so I could slide in and out to adjust string height, the feeler guage stuck in the middle sets relief and a old chinese tuner with a bridge pin stuck in the rear, the app is ap tuner for android, it cost...
by weslewis
Sat Sep 06, 2014 11:13 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Designing 12-string guitars and baritones
Replies: 18
Views: 23773

Re: Designing 12-string guitars and baritones

nut forum.pdf here is the offsets I used, the spacing between the sets is uniform, the distance between the strings is adjusted for string width, still some room for experimentation , the playability is really good, I can't stress enough how loud this thing is especially with the soundport, at leas...
by weslewis
Fri Sep 05, 2014 8:53 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Designing 12-string guitars and baritones
Replies: 18
Views: 23773

Re: Designing 12-string guitars and baritones

no it would be 12 the first cents error listed is at the 1st fret all based as close as i could get to zero in open strings, comp numbers were derived using a jig with a movable nut and bridge for each string including the octaves then drawen on cad the saddle used the numbers I came up with plus ju...
by weslewis
Fri Sep 05, 2014 11:44 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Designing 12-string guitars and baritones
Replies: 18
Views: 23773

Re: Designing 12-string guitars and baritones

12 string final freq.pdf
(134.14 KiB) Downloaded 907 times
here is the final freq chart main air 108 first coupled 186
by weslewis
Fri Sep 05, 2014 11:39 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Designing 12-string guitars and baritones
Replies: 18
Views: 23773

Re: Designing 12-string guitars and baritones

Here is the result, great sounding 12 string, very, very loud, completely compensated nut and saddle cut on my small cnc, set up is as follows. string height at 12 fret low e .080 high e .070 relief < .010 but > .005, string height at 1st fret .013, .015, for e and b .019 for the rest of the strings...
by weslewis
Mon Sep 01, 2014 10:23 am
Forum: Instrument Builders Forum
Topic: Heads up cheap pin hole reamers
Replies: 4
Views: 7262

Re: Heads up cheap pin hole reamers

same reamer I bought at harbor freight
by weslewis
Sat Aug 23, 2014 1:24 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Bridge Rotation...Another approach
Replies: 4
Views: 6994

Re: Bridge Rotation...Another approach

I use a cad drawn scale , pointer attached to a aligator clip and a cheap dial indicator holder from harbor freight :gui :dru
by weslewis
Sun Jul 13, 2014 11:54 pm
Forum: Instrument Builders Forum
Topic: Alternatives to nitro lacquer
Replies: 20
Views: 21179

Re: Alternatives to nitro lacquer

Have you considered water based lacquers??
by weslewis
Thu May 22, 2014 10:24 am
Forum: Instrument Builders Forum
Topic: wood vs celluoid
Replies: 3
Views: 4331

wood vs celluoid

I posed this question on the OLF and got some mixed answers...I am working on #17 and have only used wood for bindings, I ordered some celluloid bindings and purflings from China," I love EBAY" and thought I would try them on this project,,, for those that have used both what are your opinions, how ...
by weslewis
Sat Mar 08, 2014 1:46 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Designing 12-string guitars and baritones
Replies: 18
Views: 23773

Re: Designing 12-string guitars and baritones

I am retopping a 12 string I built a couple of years ago, there were several things I didn't like about it , neck profile , string spacing , and the sound....which I attributed to being over braced and too stiff.. so the new top is falcate braced, leaving the braces .200 thick and .350 tall, or at t...
by weslewis
Mon Mar 03, 2014 3:14 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Falcate Bracing in Curved Radius?
Replies: 9
Views: 11402

Re: Falcate Bracing in Curved Radius?

I laminate 2 pieces of spruce, .080 to .090 thick.. 3/4 inch wide , lightly radius both sides in the radius dish and then cut in two pieces in half and finish to the correct height...not sure if the radius is necessary but doesn't hurt...
by weslewis
Thu Dec 19, 2013 1:54 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Soundhole shape???
Replies: 4
Views: 7304

Re: Soundhole shape???

Hmm interesting concept the hose analogy!!! :cl I have a new small cnc that opens up a lot of new possibilities in soundhole shape...here is a practice soundboard I was playing with and got me to thinking about the shape, seems to me that as long as the area is the same it should be ok, but I am no ...
by weslewis
Thu Dec 19, 2013 6:10 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Soundhole shape???
Replies: 4
Views: 7304

Soundhole shape???

do you think that altering the soundhole shape , as long as the same area is maintained would effect low freq resonances?????????? i.e. oval, triangle etc?????
by weslewis
Thu Dec 12, 2013 11:36 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Question on stiffness and density
Replies: 4
Views: 7447

Re: Question on stiffness and density

I questioned it too ...measurements are 567 by 250 by 5.05 thick weight 267 g
I haven't thinned the panel yet but the thichness is very consistent and a perfectly quartered piece...
by weslewis
Thu Dec 12, 2013 8:54 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Question on stiffness and density
Replies: 4
Views: 7447

Question on stiffness and density

I have two builds under my belt using the spread sheet to calculate thickness...my 15th and 16th builds... I was measuring some tops I have for the next two builds ..here are some numbers,.... then a question??? #15 was Sitka density measured 404 top thickness , in inch's, .103 #16 was Euro spruce d...
by weslewis
Sun Apr 07, 2013 12:48 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Collecting Spectrographic data
Replies: 62
Views: 86121

Re: Collecting Spectrographic data

I use it on windows 8!! no problems,Va 8
by weslewis
Sat Mar 23, 2013 11:28 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Equation 4.5-7
Replies: 55
Views: 61039

Re: Equation 4.5-7

I managed to get everything under control...with the same results in open office calc, so I acquired excel 2010 and now my answers are in line with yours... :cl :cl :cl
by weslewis
Mon Mar 11, 2013 3:43 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Equation 4.5-7
Replies: 55
Views: 61039

Re: Equation 4.5-7

I am using open office calc...my spread sheet comes out to 2.99 for the sample used in table 4.5-3 instead of 2.73 ..close :cl but for some of the formula's I have simply divided by 1000 i.e El and Ec to get the decimal point in the correct place, and why do I have to enter the panel length and widt...
by weslewis
Sun Dec 23, 2012 10:49 am
Forum: Jigs & Fixtures
Topic: Fretboard shaping jig
Replies: 9
Views: 20703

Re: Fretboard shaping jig

I have never seen a combination router / polisher bit???!!!!!!! :dru

what kind of bit are you using, I have similar jig based off of Todd Stocks design on the OLF, and use a mortise bit which if done smoothly and evenly works great....
by weslewis
Fri Nov 16, 2012 2:25 pm
Forum: Instrument Builders Forum
Topic: bridge deflection gizmo
Replies: 3
Views: 4545

bridge deflection gizmo

Trying to avoid math as much as possible I rigged this up tonight to check the deflection on my OLF challenge build ..works pretty good, I drew up the scale on my cad program and is held in place by a telescoping magnetic pick up tool and attached to a cheap harbor freight dial indicator base, the p...
by weslewis
Thu Oct 18, 2012 10:39 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Nut Compensation Jig
Replies: 10
Views: 13785

Re: Nut Compensation Jig

I have modified my jig for more accuracy..and it works well...got that part...I have six runners on the jig for the six strings...my question is on a 12 string I would assume the octave strings are compensated differently on the g thru low e...???? do you have a jig with 10 runners ???
by weslewis
Thu Oct 18, 2012 1:48 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Nut Compensation Jig
Replies: 10
Views: 13785

Re: Nut Compensation Jig

Trevor , what kind of setup do you use for a 12 string compensated nut????
would you also mind sharing your 12 string nut offsets???

thanks
by weslewis
Tue Sep 04, 2012 9:26 am
Forum: Instrument Builders Forum
Topic: Help with analysis
Replies: 8
Views: 8486

Re: Help with analysis

not yet, guitar has been finished for several months and sounds really good, prototype design i have another in process with falcate bracing so i can compare
by weslewis
Mon Sep 03, 2012 9:08 pm
Forum: Instrument Builders Forum
Topic: Help with analysis
Replies: 8
Views: 8486

Re: Help with analysis

numbers are 103 , 185, 194 ,218 , 244 , 283, 327 , 389 , 456
by weslewis
Mon Sep 03, 2012 9:05 pm
Forum: Instrument Builders Forum
Topic: Help with analysis
Replies: 8
Views: 8486

Re: Help with analysis

finished steel string guitar, strung up