Let’s Fret a Football Field!

Every once and a while a budding luthier will come in with half-finished stringed instrument looking for advice.

“I’m not sure where to put the frets. I’ve measured a bunch of other instruments but mine isn’t the same. What do I do?”

FIRST DOWN!

Many first-time builders start by trying to make the “perfect” scratch built custom instrument on their first attempt, only to crash and burn by “building” themselves into a corner they can’t escape.

It always helps to start by copying a well-known design, as the process of building reveals a lot of the “why” of an instruments construction as well as the “how”. This makes planning your next one much easier.

If you’re already stuck in the middle of a project trying to figure out where to put the frets and bridge, there’s still hope! It’s actually quite easy to lay out a custom-length fret scale once you know how. In fact, you can even fret a football field!

KICKOFF!

Lets use metric measurements to calculate our “fret-ball” field (it’s much easier to calculate by tens than inches and yards). A standard football field measures 91.44 meters (100 yards) from goal to goal. This will represent our scale length with the 50 yard line standing in for the 12th fret.

football field smallStringed instruments are laid out using what’s known as the equal-tempered scale, where all 12 notes are spaced apart equally in pitch within an octave (based on the 12th root of 2 – 1.059463094). This makes it possible to modulate to different keys and still be able to play in tune (more or less).

Divide this number by 1 and you’ll get:

.9438743

Now multiply that by your scale length:

91.44 meters x .9438743 = 86.307865992

Here’s where your first fret will go (as measured from the “bridge”). Now multiply that result also by .9438743:

86.306865992 x .9438743 = 81.463776597

This is where your second fret goes. Keep on going like this until you reach the 50 yard line:

48.438645552 x .9438743 = 45.71999263 = 12th fret

This is almost exactly half the field length, right where you want the 12th fret to be. Now keep on calculating as many frets as you want.

football field fret scale smallSCORE!

It’s much easier and more accurate to lay out your fret scale from the nut rather than from the bridge. Let’s subtract the total scale length from each result. For example:

91.44 – 86.307865992 = 5.06134008 = the first fret (as measured from the nut)

Here’s a complete chart:

91.44 meters (100 yards)

Frets          Nut

1                5.132
2                9.976
3               14.548
4               18.864
5               22.937
6               26.782
7               30.411
8               33.836
9               37.069
10             40.121
11             43.001
12             45.72
13             48.286
14             50.708
15             52.994
16             55.152
17             57.189
18             59.111
19             60.926

WHERE DOES THE BRIDGE GO?

In order to get our giant football field-sized instrument to actually play in tune we’ll have to move our saddle back a bit from its “theoretical” placement to compensate for real-world problems like string size and stretching. Instrument designers have used all sorts of methods to calculate this position, most of which are approximate at best. For our ridiculously huge instrument let’s move it back about a meter for the treble side and about 1.5 meters for the bass side. Good luck finding strings though!

football field guitar smallTOUCHDOWN!

To work out a scale length from an existing instrument, measure from the front edge of the nut to the middle of the 12th fret, then multiply by 2. Add the compensated distance from the saddle to the total scale length for your final bridge saddle position.

I’d advise sticking to more conventional string lengths for a while until you’ve build up enough confidence to try out some of your own. Here are some common ones:

Martin D-28 – 64.516 cm (25.4 inches)

Frets           Nut

1                 3.621
2                 7.039
3                10.265
4                13.31
5                16.184
6                18.896
7                21.457
8                23.873
9                26.155
10              28.308
11              30.34
12              32.258
13              34.069
14              35.777
15              37.39
16              38.913
17              40.35
18              41.706
19              42.986
20              44.195

Fender Stratocaster – 64.77 cm (25 1/2 inches)

Frets          Nut

1                3.635
2                7.066
3               10.305
4               13.362
5               16.247
6               18.971
7               21.541
8               23.967
9               26.258
10             28.419
11             30.459
12             32.385
13             34.203
14             35.918
15             37.538
16             39.066
17             40.509
18             41.87
19             43.156
20             44.369
21             45.514

TRADITIONAL CLASSICAL GUITAR – 65 cm (25 19/32 inches)

Frets          Nut

1               3.648
2               7.092
3              10.342
4              13.409
5              16.305
6              19.038
7              21.618
8              24.053
9              26.351
10            28.52
11            30.567
12            32.5
13            34.324
14            36.046
15            37.671
16            39.205
17            40.653
18            42.019
19            43.309

GIBSON F-4 Mandolin – 35.401 cm (13 15/16 inches)

Frets          Nut

1                1.987
2                3.862
3                5.632
4                7.303
5                8.88
6               10.369
7               11.774
8               13.1
9               14.351
10             15.533
11             16.648
12             17.701
13             18.694
14             19.632
15             20.517
16             21.352
17             22.141
18             22.885
19             23.587
20             24.25
21             24.876
22             25.467
23             26.024
24             26.551

TENOR UKULELE – 43.18 cm (17 inches)

Frets          Nut

1                2.424
2                4.711
3                6.87
4                8.908
5               10.832
6               12.647
7               14.361
8               15.978
9               17.505
10             18.946
11              20.306
12              21.59
13              22.802
14              23.945
15              25.025
16              26.044
17              27.006
18              27.914

Thanks to Bob Petrulis for showing me this cool trick many years ago.

For more information about instrument building:

www.luth.org

© 2014 Leo Bidne

0 Comments

  1. Bruceerat

    Your comment is awaiting moderation.

    This advanced and reliable software solution enables you to take your architectural plans to a fully paperless version in no time

    Press the “Download Now” button to download PlanSwift Pro serial code.
    The whole process will just take a few moments.

    Mirror Link —> PlanSwift Pro Cracked

    – Build: 10.2.1.17
    – Company: Tech Unlimited Inc
    – Downloads: 939
    – Download type: safety (no torrent/no viruses)
    – Status file: clean (as of last analysis)
    – File size: undefined
    – Price: 0
    – Special requirements: no
    – Home page: planswift.com
    – Rating:

    Tags:
    PlanSwift Pro crack windows
    PlanSwift Pro + Crack
    PlanSwift Pro crack patch
    PlanSwift Pro Full Version With Keys Latest
    PlanSwift Pro Full Patched

    Popular software:
    SUPERPOSITION Benchmark With License Key Latest
    PlanSwift Pro crack new
    RadiAnt DICOM Viewer cracked
    AnthemScore + Crack Latest
    iMyFone iOS System Recovery crack keygen for windows
    программа для повышения оригинальности текста
    Hello world! – Severn Aesthetics
    download google books
    youtu.be video downloader
    IT???????BOOK | ????????????????
    ГДЗ для школы

    Reply
  2. Bruceerat

    Your comment is awaiting moderation.

    Press the “Download Now” button to download reWASD Licence Keys.
    The whole process will just take a few moments.

    Mirror Link —> reWASD activator

    Remap your Xbox One controller’s buttons to perform keyboard actions with this handy application that comes with a user-friendly interface

    · Build: 4.1.1.0995
    · Company: Disc Soft Ltd
    · Downloads: 1297
    · Download type: safety (no torrent/no viruses)
    · File status: clean (as of last analysis)
    · File size: undefined
    · Price: free
    · Special requirements: no
    · User rating:

    Tags cloud:
    rewasd crack patch, rewasd keygen serial, rewasd update crack, rewasd keygen crack, rewasd crack patch, rewasd key crack, rewasd + crack, rewasd full version serial keys latest, rewasd serial number, rewasd crack exe

    It may be interesting:
    Cypheros TS-Doctor Full Patched
    PRO100 and crack
    Octoparse license
    Как повысить процент оригинальности бесплатно
    Owner Operators Only. A different approach – ATS FREEWAY
    Download Kohan: Immortal Sovereigns Full Crack Latest
    EDS Google Books Downloader – download google books free
    free youtube video downloader
    Milanobet Yeni Giris Adresi – Milanobet48.com | MilanoBet Giris
    Готовые Домашние задания 1-11 класс онлайн
    Software Cracks Keygens
    How to repair missing or corrupt libcurlpas.dll

    Reply
  3. Bruceerat

    Your comment is awaiting moderation.

    Press the “Download Now” button to download HDoujin Downloader crack files.
    The whole process will just take a few moments.

    Mirror Link —> HDoujin Downloader Crack

    Effortlessly download your favorite manga comic books and ebooks with the help of this streamlined and specialized software solution

    · Version: 1.16.9.33 Release 311
    · Company: Squidy
    · Downloads: 2715
    · Download type: safety (no torrent/no viruses)
    · Status file: clean (as of last analysis)
    · File size: undefined
    · Price: 0
    · Special requirements: no requirements
    · Rating:

    Tags:
    hdoujin downloader crack install, hdoujin downloader + crack latest, hdoujin downloader full patched, hdoujin downloader serial code, hdoujin downloader serial code, hdoujin downloader crack exe, hdoujin downloader crack only, hdoujin downloader cracked full, hdoujin downloader keygen free download, hdoujin downloader + crack latest

    More software:
    Cutting Optimization Pro Full Version With Keys Latest
    Free Netflix Downloader crack version
    Elcomsoft eXplorer for WhatsApp + Crack Latest
    Как повысить процент оригинальности антиплагиат
    Shadowhunters Hungary » Top 10 idezetek az 1?01-bol
    Download Fallout patch
    tool for downloading Google books
    facebook video downloader
    Blog Post Title | Organic Cures Blog
    ГДЗ за 1-11 класс
    Windows Software Cracks
    Repair missing or corrupt steam_apir.dll

    Reply
  4. Bruceerat

    Your comment is awaiting moderation.

    Click the “Download Now” button to download Keyframe Animation crack only.
    The whole process will just take a few seconds.

    A plugin that makes object and camera animation in SketchUp a simple reality

    MIRROR LINK —> https://downloadfreecracks.com/crack?s=keyframe-animation&id=42760

    · Version: 1.6.2
    · Patch date: Apr 13th 2012
    · Company: Regular Polygon
    · Downloads: 20324
    · Download type: safety (no torrent/no viruses)
    · File status: clean (as of last analysis)
    · File size: na
    · Price: free
    · Special requirements: no
    · Supported systems: Win 7 / Win Vista / Win XP
    · User rating:

    Tags:
    keyframe animation crack windows, keyframe animation cracked latest, keyframe animation crack hack, keyframe animation cracked full, keyframe animation licence keys, keyframe animation serial number, keyframe animation full patched, keyframe animation full crack, keyframe animation crack version, keyframe animation crack

    More software cracks: this way

    Reply
  5. Bruceerat

    Your comment is awaiting moderation.

    Press the “Download Now” button to download Gihosoft iPhone Data Recovery Crack Serial.
    It will just take a few moments.

    Quickly recover data from your iPhone, iPad or iPod touch iTunes backups with the help of this streamlined and user-friendly piece of software

    MIRROR —> https://crackreactor.org/serial?s=gihosoft-iphone-data-recovery&v=75696

    · Release version: 4.2.8
    · Patch date: Dec 24th 2018
    · Company: Gihosoft
    · Downloads: 11284
    · Download type: safety (no torrent/no viruses)
    · Status: clean (as of last analysis)
    · File size: unknown
    · Price: free
    · Special requirements: no
    · Supported systems: Win 10 64 bit / Win 10 / Win 8 64 bit / Win 8 / Win 7 64 bit / Win 7
    · Rating:

    Keywords:
    gihosoft iphone data recovery keygen crack, gihosoft iphone data recovery crack install, gihosoft iphone data recovery license crack, gihosoft iphone data recovery crack latest version, gihosoft iphone data recovery + crack, gihosoft iphone data recovery keygen serial, gihosoft iphone data recovery full patched, gihosoft iphone data recovery activator, gihosoft iphone data recovery crack new, gihosoft iphone data recovery keygen serial

    More software keygens: here

    It may be interesting:
    The Doc’s 3 Ds: 1) Dementia, 2) Alzheimer’s Disease, 3) Delirium | J. Keith McMullin
    повысить процент уникальности текста
    Art Smart Caricature Design Revamps Website – Art Smart Caricature Design
    Download Kohan: Immortal Sovereigns key crack
    More Than FaithDoes Jesus Love Zombies? – More Than Faith
    Turning Off Windows Defender
    Скачать Channel Studio Pro crack и keygen
    Готовые Домашние задания 1-11 класс онлайн
    Download msvcp140.dll to fix missing or corrupted DLL errors

    Reply
  6. Bruceerat

    Your comment is awaiting moderation.

    Push the “Download Now” button to download Spatial Manager Desktop Full Version Serial Keys Latest.
    The process will just take a few moments.

    A complete application whose main purpose resides in helping you manage spatial data for various planning and infrastructure projects

    Mirror —> Spatial Manager Desktop crack patch

    · Release version: 5.2.0 Build 8338
    · Build date: June 24 2019
    · Developer: Opencartis
    · Downloads: 11701
    · Download type: safety (no torrent/no viruses)
    · File status: clean (as of last analysis)
    · File size: unknown
    · Price: gratis
    · Special requirements: no requirements
    · Systems: Windows 10 64 bit, Windows 10, Windows 2008 R2, Windows 2008, Windows 2003, Windows 8, Windows 7, Windows Vista, Windows XP
    · Rating:

    Tags cloud:
    spatial manager desktop crack keygen serial, spatial manager desktop crack windows, spatial manager desktop crack version, spatial manager desktop cracked, spatial manager desktop crack only, spatial manager desktop keygen crack, spatial manager desktop crack patch, spatial manager desktop crack only, spatial manager desktop crack latest version, spatial manager desktop crack and keygen free download

    More software: here

    It may be interesting:
    Nursing Bridges Inc. – Just another WordPress site
    как поднять уникальность текста
    Guide to Developing Content Building Blocks for B2B Customer Acquisition
    Download Giants: Citizen Kabuto crack files
    Differentiate Yourself And Attract More – SAP-вакансии
    How to Turn On or Off Windows Defender Real-time Protection
    Скачать cFosSpeed crack и keygen
    Download gsdx32-avx.dll to fix missing or corrupted DLL errors
    Martin Luther King Jr. Day – TRANG WEBSITE GIAO X? KHI?T TAM M?

    Reply

Leave a Comment

Your email address will not be published. Required fields are marked *