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Help,

I'm making an uke,Got my plans.Waiting on parts.I wanted to use the waiting time to make a plans and patterns.I went to lay out the frets and all went to hell in a hand basket.I used the Stu-mac calacator .Life is good,then I check the numbers with my store bought uke and nothing lines up.So I tried the .9439 method and no luck there. So I thought I might buy a template and use that.Couldn't find one.I did find a free one and printed it out. It don't match up either. What gives? I am making a concert model.Scale lenght 15 inches. The #12 fret should be 7.50 inches. It seems like the distance should set in stone.

 Please type slowly if you answer me cause I'm a little slow(joke).

Thankyou.

Played15

 

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Replies to This Discussion

Hi Bobby,

Well I found some calculators to be a little out.  If we look at your concert uke with a 15" scale you are 100% correct, at the 12th fret the scale length should be 7.5".  When the bridge is fitted some compensation should be added to this 15" scale length to allow for the fact we alter the string length when we press down to play a note. I add about 3/32" or so. The saddle is now 15 3/32" from the nut. (Still fret spacings are calculated for 15" scale)  So, intonation will be as good as you can get it at the 12th fret.  That is if we play an open C then we should have a C when 12th fret is depressed. (Although one octave higher)  I have found some scale calculators have added this compensation to the scale length in their calculators but this is not correct.  Not sure if I've helped.......I build ukes loosely based on Hana-Lima plans and am happy to send the dimensions they use if that would help.  I know they are correct for tenor so I would think concert would be good also.

Cheers

Daryl

Paradise Ukuleles

Paradise Beach Australia

www.darylhooke.com/pu

I just checked WFRET calculator and it aligns to my Hana - Lima plans.

You can get WFRET from

http://www.cigarboxnation.com/profiles/blogs/measuring-frets-the-ea...

Cheers

Daryl

Your work is awesome.Thank you for your reply. I would humbly accept your offer.I will keep me from going nuts.Thank you for your help.Bobby Fields



Daryl said:

Hi Bobby,

Well I found some calculators to be a little out.  If we look at your concert uke with a 15" scale you are 100% correct, at the 12th fret the scale length should be 7.5".  When the bridge is fitted some compensation should be added to this 15" scale length to allow for the fact we alter the string length when we press down to play a note. I add about 3/32" or so. The saddle is now 15 3/32" from the nut. (Still fret spacings are calculated for 15" scale)  So, intonation will be as good as you can get it at the 12th fret.  That is if we play an open C then we should have a C when 12th fret is depressed. (Although one octave higher)  I have found some scale calculators have added this compensation to the scale length in their calculators but this is not correct.  Not sure if I've helped.......I build ukes loosely based on Hana-Lima plans and am happy to send the dimensions they use if that would help.  I know they are correct for tenor so I would think concert would be good also.

Cheers

Daryl

Paradise Ukuleles

Paradise Beach Australia

www.darylhooke.com/pu



Bobby Fields said:

Your work is awesome.Thank you for your reply. I would humbly accept your offer.I will keep me from going nuts.Thank you for your help.Bobby Fields



Daryl said:

Hi Bobby,

Well I found some calculators to be a little out.  If we look at your concert uke with a 15" scale you are 100% correct, at the 12th fret the scale length should be 7.5".  When the bridge is fitted some compensation should be added to this 15" scale length to allow for the fact we alter the string length when we press down to play a note. I add about 3/32" or so. The saddle is now 15 3/32" from the nut. (Still fret spacings are calculated for 15" scale)  So, intonation will be as good as you can get it at the 12th fret.  That is if we play an open C then we should have a C when 12th fret is depressed. (Although one octave higher)  I have found some scale calculators have added this compensation to the scale length in their calculators but this is not correct.  Not sure if I've helped.......I build ukes loosely based on Hana-Lima plans and am happy to send the dimensions they use if that would help.  I know they are correct for tenor so I would think concert would be good also.

Cheers

Daryl

Paradise Ukuleles

Paradise Beach Australia

www.darylhooke.com/pu

I am making a travel uke with 12 frets in the concert size.Thank You Bobby

OK here are the calcs for 12 frets 15" scale using WFRET calculator.

distances from nut to fret:-

1 - 0.84"

2 - 1.64"

3 - 2.39"

4 - 3.09"

5 - 3.76"

6 - 4.39"

7 - 4.99"

8 - 5.55"

9 - 6.08"

10 - 6.58"

11 - 7.05"

12 - 7.50"

Cheers

Daryl

Daryl,Thanks for your help.I don't feel like I'm blind now.Kinda like driving without a GPS or for us old people a map.

May God bless. Bobby Fields



Daryl said:

OK here are the calcs for 12 frets 15" scale using WFRET calculator.

distances from nut to fret:-

1 - 0.84"

2 - 1.64"

3 - 2.39"

4 - 3.09"

5 - 3.76"

6 - 4.39"

7 - 4.99"

8 - 5.55"

9 - 6.08"

10 - 6.58"

11 - 7.05"

12 - 7.50"

Cheers

Daryl

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