Solo Music Gear JBK-1 User manual

Copyright © 2011 Solo Music Gear. All rights reserved
Solo JB Style DIY
Electric Bass Guitar Kit
Assembly Manual
JBK-1
V 1.02

Solo JB Style DIY Electric Bass Guitar Kit
Copyright © 2011 Solo Music Gear. All rights reserved | v1.02
1
Materials List
Press-fit peghead bushings
String Retainer (1 mounting screw included)
Neck
Tuning Machines (4 pcs, 16 mounting screws included)
Strings (4 pcs)
Strap Buttons (2 pcs, 2 mounting screws included)
Pickguard (10 mounting screws included)
Neck Pickup (4 mounting screws and 4 height adjustment springs included)
Bridge Pickup (4 mounting screws and 4 height adjustment springs included)
Bridge (7 mounting screws included)
Body
Neck Plate (4 mounting screws included)
Control Plate Assembly (3 mounting screws included)
Ground Wire
Cord
Hex wrench for truss-rod adjustment
Show Off Your Custom Built Guitar!
W hen you have your guitar finished, please take a few pictures and send them to us for potential posting into
the picture gallery on our website.
Post your photos to our Facebook page
http://Facebook.com/SoloMusicGear
Post your photos to The Solo Café
http://TheSoloCafe.com
Remember, you can always find us online at http://SoloMusicGear.com to upgrade your parts, try a new kit,
or ask us a question.

Solo JB Style DIY Electric Bass Guitar Kit
Copyright © 2011 Solo Music Gear. All rights reserved | v1.02
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Thank you for purchasing a Solo DIY guitar kit. This unfinished guitar kit has everything for building an
electric bass guitar –you will need only some basic tools and finishing supplies. All challenging wood
cutting, drilling and shaping is already professionally done, as well as fret leveling and dressing.
1. CHECKLIST
Before you start working on your DIY guitar project, please check all the parts received in this kit using the
materials list above.
2. TOOLS AND MATERIALS NEEDED
You will need the following tools and materials:
1. Sand Paper (180, 240 and 320 grit)
2. Sanding Block
3. Soldering Iron & Solder
4. Masking Tape
5. Finishing Supplies
6. Screwdrivers
7. Power Drill
3. SAFETY MEASURES
Some woodworking skills are required to complete this project. Always be aware of the necessary safety
precautions and follow them –be sure to use safety glasses and a dust mask when you are working with any
tools. If you are a novice, you should look for help and guidance of a more experienced friend. And never
forget that it’s always better safe than sorry.
4. FINISHING THE BODY AND NECK
Before you start finishing the neck, please inspect the frets and the fingerboard. Even though all wood is kiln-
dried it may still shrink a little so you may get sharp fret edges.
In this case you need to use a fine needle file (Emory boards for finger nails can be used instead) to remove all
sharp edges: first make all fret edges flat with the fretboard edges on both sides, than use masking tape on
the top of the fretboard to protect it, and work on each fret’s edge to smooth it by slightly rounding it. Before
removing the masking tape, consider polishing the frets with fine steel wool.

Solo JB Style DIY Electric Bass Guitar Kit
Copyright © 2011 Solo Music Gear. All rights reserved | v1.02
3
STEP 1 –The body and neck have been coated with a poly resin sealant. They need to be sanded before
finishing. DO NOT SAND THE FINGERBOARD.
For sanding both neck and body, use a flat sanding block for all flat surfaces and by hand for edges and
rounded/curved surfaces. Start with 180 grit sandpaper, continue with 240 and finish with 320, always
moving along the grain only. Before the final sanding, wipe the wood with a damp cloth and let it dry to raise
the wood grain.
STEP 2 –There are many different ways to apply finish to your guitar. Do a little research to decide which
type of finish you want to use. One good starting point is to review tutorials at the Project Guitar website:
http://www.projectguitar.com/tut/tutorial5.htm
STEP 3 - For any type of spraying finish (lacquer or paint) you will need to mask three areas with masking
tape: neck pocket on the body, neck’s fingerboard and truss rod nut. Press the tape tightly to the wood, not
allowing any gaps at the edges, to completely prevent the finish leaking to these areas.
STEP 4 - You will also need to make hangers for both the body and neck (if you want to apply
any spraying finish). Make them from a strong metal wire (wire dress/coat hanger can be used for it).
STEP 5 –Apply the finish by following the manufacturer instructions. Remember that spraying the finish is not
an easy process as it requires certain skill and experience –you might want to practice first on some scrap
wood. Always remember your safety –work only in a well ventilated area, away from any open fire and wear
a respirator mask and safety glasses.
STEP 6 –Final polishing for high gloss finishes can be done manually or using a power drill with a foam
polishing pad. The finishing tools and materials are readily available in many automotive/hardware supplies
stores.
TIP: Consider an oil rubbed finish (sometimes called “wipe-on oil finish”) as a good and safe alternative.
Tru-Oil® (known as a “Gun Stock Finish”, based on Linseed Oil) or Waterlox® (Processed Tung Oil) is highly
recommended. Oil finishing takes longer, but it is very safe and easy to apply and a high quality finish can
be achieved, even by a novice.
5. ASSEMBLY
STEP 1 –Install the Machine Heads neck’s headstock. First tap in the machine head bushings into the holes
on the headstock. For tapping, you can use either a plastic headed hammer, or a regular hammer, by placing
a small piece of wood on the top of a bushing to prevent any potential damage. You may also use a medium-
sized screwdriver - slide the bushing over the shaft of the screwdriver and then tap the handle of the
screwdriver with a hammer (IMPORTANT: firmly support the headstock!) Next insert Machine Heads from
the back and align them properly. Use a pencil to mark the place for each screw pilot hole. Remove the

Solo JB Style DIY Electric Bass Guitar Kit
Copyright © 2011 Solo Music Gear. All rights reserved | v1.02
4
tuners and connect the centers of the corresponding marks with the straight lines. Now you are ready to put
the machine heads back and centerpunch right on the lines –this way you will ensure consistent alignment
of all 4 machine heads. For drilling the pilot holes use a right drill bit –0.06” or 1.5mm. Be careful not to drill
through the headstock, as you need only about half way depth of the hole –better to do it slowly in two-
three shorter steps, pulling the bit out and cleaning it. Complete machine heads installation by tightly
fastening Machine Heads with the screws.
STEP 2 - Attach the neck to the body using 4 screws with a neckplate and a setter. This step can be performed
later as you may find it easier to assemble the body without the neck.
STEP 3 –Install the bridge. First insert the ground wire (the insulation must be removed on both ends) into
the hole between the predrilled mounting screw holes and the control cavity Make sure that enough
length of bare metal wire is left on top of the body to make a secure contact with the bridge. Now align the
bridge with mounting screw holes and attach it tightly with 8 screws.
STEP 4 –Install the pickups. Insert the height adjustment screws into the pickup ears and put the height
adjustment springs from the back. Holding the strings in place push the screws into the mounting holes and
roughly adjust the pickups height.
STEP 5 - W ire the pickups and the ground wire to the preassembled control plate. For wiring instructions use
the diagram on the last page of this manual.
STEP 6 –Install the control plate and the pickguard - properly align and secure them with the mounting
screws. Do not over tighten the screws as it can crack the pickguard plastic.
STEP 7 –Install the Strap Buttons. If the pilot holes for the screws are missing, you will need to drill them first.
Find a proper spot right in the middle of the body’s depth, centerpunch and drill a pilot hole using 3/32”
(2.4mm) drill bit. Put the screw through the Strap Button then put the washer over the screw to protect the
wood of the body. Tightly secure the Strap Button.
STEP 8 –Before stringing your guitar, apply some oil to the Rosewood fingerboard to protect it from possible
shrinking and cracking. Tung oil or Linseed oil work well, or it’s OK to use Walnut or Olive oil. One thin layer is
enough. Wipe the fingerboard thoroughly with a clean cloth.
STEP 9 –Install the strings by inserting them through the holes on the back of the bridge, over the bridge
saddles. Cut the string 2 tuners longer than the tuner you are going to stick it in. On D and G you will just
have to estimate. Stick the end all the way down in the hole and bend a 90 degree. Hold on to the string and
wind it up.
STEP 10 –Now is the time to install the strings retainer. First roughly tune your bass guitar to the pitch (see
below). Reduce tension of the first (G) and the second (D) strings so that you can easily push them towards

Solo JB Style DIY Electric Bass Guitar Kit
Copyright © 2011 Solo Music Gear. All rights reserved | v1.02
5
the headstock (they should not being too loose, though), Place the retainer between the strings beneath the
3rd (A) string post and push the retainer down. Next you need to find such a place for the retainer that
when pushed all the way down it will ensure the angle of the strings a little sharper than the angle of the
3rd (A) string. This will result in the optimal string pressure at the nut. When you find the right spot align the
retainer between the strings so that it visually looks like it is exactly in the middle, mark the screw place
through the hole in retainer. Remove strings, centerpunch at the mark you’ve made, drill a pilot hole and
tightly secure the retainer with a screw. Assembly is done.
6. TUNING AND SETUP
Tuning a 4-string bass guitar:
The open strings of a regular bass guitar, from the thickest to thinnest, in standard tuning are:
•E (1st octave) –the thickest (or lowest sounding) string - is the 4th string
•A (1st octave) –is the 3rd
•D (2nd octave) –is the 2nd
•G (2nd octave) –the thinnest (or highest sounding) is the 1st string.
There are different methods to tune a guitar. Using a digital tuner is the easiest way. However, it is good to
learn tuning (and checking the accuracy of tuning) by ear with natural harmonics, unisons, octaves etc.
Guitar playability and intonation depends on its setup, so you may want to spend some time mastering the
necessary skills –be persistent in finding the optimal action (string height), neck relief and intonation
throughout the entire neck.
Adjusting Strings Height:
String height is adjusted by the bridge saddle screws (use included Allen key). Since the fretboard has a
radius, the heights of all strings should also match it. Thicker strings need more room for vibration
without “buzzing” (touching frets) and must be set up higher than thinner strings. Low action allows
easier fretting and faster playing. Recommended measurements for electric bass guitar with low action:
For the 1st String (the thinnest) –height at the 1st fret: 0.020” – 0.024” (0.5 – 0.6mm);
at the 12th fret: .094” – .1” (2.4 – 2.6mm).
For the4th String (the thickest) –height at the 1st fret: 0.022” – 0.025” (0.55 –0.64mm);
at the 12th fret: .094” – .0110” (2.6 – 2.8mm).

Solo JB Style DIY Electric Bass Guitar Kit
Copyright © 2011 Solo Music Gear. All rights reserved | v1.02
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The height at the first fret can be adjusted by cutting deeper slots for strings at the nut. However, it
needs a very precise job not to spoil the nut. If you are not sure that you can do it properly, stay with a
factory pre-cut nut.
A higher string action makes the guitar harder to play, yet some musicians may prefer it.
Adjusting Neck Relief:
The truss rod compensates for string tension and allows adjusting the neck relief. You may need s uch
adjustment due to changes of humidity and temperature (or if you switch strings to a different gauge).
Lay a straight edge on the frets of a properly tuned guitar and measure the clearance at the 8th fret
(alternatively you can put a capo on the first fret and press down 6th string at 16th fret –then the height
of the string at the 8th fret will show you the clearance). Optimal relief for an electric guitar neck must
be very small –around .014”- 024” (0.35 - 0.6mm). Turning the truss rod nut (with the included Allen
key) clockwise will reduce neck relief and turning it counterclockwise will increase the relief. Be very
careful with truss rod adjustments and never turn the nut more than ¼ of a turn at a time.
Adjusting Intonation:
The “speaking length” (or “working length”) of each string can be adjusted by turning the saddle position
adjustment screw. The best intonation can be achieved when the string fretted at the 12 fret sounds
precisely an octave higher than the open string. If the fretted string sounds sharper you need to increase
the working length of the string by moving the saddle away from the neck. If it sounds flat, you need to
shorten the working length of the string by moving the saddle towards the neck. The alternative way to
intonate your guitar is to compare a natural octave harmonic of
the open string (you can get it by touching the string exactly above the 12th and picking it) to the pitch of
the string fretted at the 12th fret and adjusting the saddle position so that they sound the
same. This method is less accurate because the fretted string sounds a bit sharper due to the height of
the string, and the higher the action, the sharper it gets.
Adjusting Pickup Height:
Before adjusting the pickup height, make sure that both the volume and tone controls on your bass are set to
the full (“10”) position. Get your amp set to a medium/low volume and all tone controls to the middle. You
will get a better picture of the pickup’s tone change during its height adjustment with a clear sound.
There is no universal “optimal” pickup height position in a setup – it depends on playing style and personal
preferences of a bass player. Remember: bringing a pickup closer to the strings makes it sound brighter, but
bringing it too close will make the magnetic field of the pickup interfere with the vibration of a string which
will, not only result in reduced sustain, but may also cause complex harmonics sound rather unpleasant.
Moving a pickup too far from the strings will result in loss of its output signal and some higher frequencies. It’s

Solo JB Style DIY Electric Bass Guitar Kit
Copyright © 2011 Solo Music Gear. All rights reserved | v1.02
7
not necessary to maintain an even height of the pickup –you may find it more satisfactory sounding by setting
it somewhat angled, depending on what you are looking for in the output sound.
There are a few mm of real usable range where you can find the pickup tone that you’ll like the best.

Solo JB Style DIY Electric Bass Guitar Kit
Copyright © 2011 Solo Music Gear. All rights reserved | v1.02
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PBK-1 Wiring Diagram