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Hi - I'm about to start working on my first guitar, and I've been wondering about the positioning of frets.

When you press a string down to a fret the tension in the string is increasing a very little bit so that essentially, it it detuned a bit. I've no idea how much this is, I've no idea if this is a real of a theoretical problem. Anyway, I guess it should be "worst" at the first fret.

Now, while calculating the correct fret positions, would you take the mathematically correct positions or should one introduce a compensation for that ?

Ludo

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You are right about the detuning. The frets are placed at the mathematically correct position. To compensate for the detuning the bridge gets adjusted so that the length from nut to bridge is usually a little longer the the theoretical scale length. If you are unsure about your calculations then double check with this fretcalculator. I used that one with great success....

HTH,

Marcel!

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You can compensate for this by reducing the distance from the first fret to the nut.

The lower the action, the less effect fretting a note has. The longer the string length, behind the saddles and the nut, the less effect it has.

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Don't some Gibsons have a zero fret near to the nut, I thought that's what it was for.

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You can compensate for this by reducing the distance from the first fret to the nut.

By how much??, and I thought increasing the tension would raise the pitch not detune it

Chris

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by 2.2 percent of the distance, and it does help i do this on all my necks, it makes a noticable difference.

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I thought increasing the tension would raise the pitch not detune it

Of course it raises the pitch, who said thats not the case??

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just a question. these are the fret distance and from what i can see, it has the 0.5, 0.9. etc... can i make the numbers all even? say, 36.5 to 37, 70.9 to 71. can it be done?

Fret Dist from Nut

1 36.5

2 70.9

3 103.4

4 134.1

5 163.1

6 190.4

7 216.2

8 240.5

9 263.5

10 285.2

11 305.7

12 325.0

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can i make the numbers all even? say, 36.5 to 37, 70.9 to 71. can it be done?

I presume you mean round UP to the nearest integer?

I wouldn't do that as you will introduce a systematic error into your fret distances. Working to a tenth of a millimeter is fine. I put a vernier on my fret jig which makes it even easier

Keith

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by 2.2 percent of the distance, and it does help i do this on all my necks, it makes a noticable difference.

Is this for the first fret only or do the rest shift up too?

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