Graphtech GHOST Manuale utente
GHOST Pickup System
Acousti-Phonic Intelligent Pre-amp
User Guide
Plug into a world of possibilities.
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Thank you for purchasing the GHOST™ Modular Pickup System. We have
worked long and hard developing and testing this system to give you the best
acoustic sound available today. We are sure that you will enjoy playing and per-
forming with it as much as we do!
The principle behind the GHOST Modular Pickup System is simple but the
results are truly amazing. By strategically implanting a custom engineered piezo
pickup inside a set of Graph Tech saddles then processing the signal through
the Acousti-Phonic Intelligent Pre-amp, the natural acoustics of your guitar are
captured. Feedback and mic placement problems associated with an amplied
acoustic guitar are eliminated, and you can play as hard as you like without
overload.
This guide describes installing the GHOST Modular Pickup System and the
GHOST Acousti-Phonic Intelligent Pre-amp in your guitar.
• The GHOST Modular Pickup System consists of custom engineered piezo pick-
ups individually calibrated and supplied as a matched set. They are available in
a variety of different saddle styles. Refer to the Graph Tech catalog for the correct
saddle to suit your guitar before proceeding.
• The GHOST Acousti-Phonic Intelligent Pre-amp is an integral part of the GHOST
sound. It processes the signal from the pickups to create a pristine acoustic tone,
and provides the perfect interface to a console or guitar amp. Through an intelli-
gent stereo jack the Acousti-Phonic Intelligent Pre-amp provides both the original
magnetic pickup signal and the GHOST acoustic signal, or a continuously variable
blend of the two. You should have obtained either the Guitar or Bass version of the
Acousti-Phonic Intelligent Pre-amp to suit your instrument.
• The installation of the GHOST system can be achieved without the use of the
Acousti-Phonic Intelligent Pre-amp, however this is not recommended. The
preamp was designed to enhance the overall tonal quality of the GHOST system
while allowing for intelligent switching between mono and stereo.
Welcome to the World of Graph Tech!
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Parts List
Set of GHOST-equipped saddles
Common connector block
Part number BE-5017-00
Dual Connector Teon Cable Assembly
Part number BE-5021-00
GHOST Acousti-Phonic Intelligent Pre-Amp
Passive Volume Kit
Stereo Jack
Volume potentiometer (pot), 5 Mega Ohm
Resistor, 5 Mega Ohm
Teon Cable
330pf Capacitor
Acousti-Phonic Intelligent GuitarPre-amp
Part number PE-0210-00, or
Acousti-Phonic Intelligent Bass Pre-amp
Part number PE-0310-00
Stereo Switched Jack
Part number PE-0216-00
Battery Snap Cable Assembly
Part number BE-0204-00
Part number BE-0205-00 (Clip)
Connector Cable Assemblies
Part number BE-5002-00 Six-Pin
Part number BE-5003-00 Six-Pin
GHOST Pickup System
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x 6
x 1
x 1
QSW
PIN
MID
FAA
S
VOL
MAG
RING
TIP
SW
PWR
x 1
x 1
x 1
x 1
x 1
x 1
x 1
x 1
Part number PE-0400-00 includes:
x 1
(PURPLE, YELLOW, GREEN & BLACK LEAD)
(RED, WHITE, BLUE & BLACK LEAD)
BLACK (E), BLUE (B), GREEN (G), YELLOW (D), RED (A) & WHITE (E) LEADS.
x 1
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Q
Q
P
M
G
V
M
R
T
S
P
B
RED
TEFLON
EMPTY
BLUE
PURPLE
YELLOW
GREEN
RED
BLUE
WHITE
RED
RED
QuickSwitch
Piezo In
Mid Boost or
Push/Push Vol Pot
Stereo Jack
Power/Battery
BLACK
Optional
QuickSwitch
(PE-0111-00)
Optional
Push/Push Volume Pot
or MidBoost Switch
(PE-0206-00 or
PE-0106-00)
Magnetic In
(GREEN)
Stereo Jack
Power/Battery
Common
Connector Block
(BE-5017-00)
GHOST System Overview
IMPORTANT! This diagram
is an artistic representation
only, not a schematic.
Consult this guide for correct
wiring procedure to avoid
voiding your warranty.
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Q
Q
P
M
G
V
M
R
T
S
P
B
RED
TEFLON
EMPTY
BLUE
PURPLE
YELLOW
GREEN
RED
BLUE
WHITE
RED
RED
QuickSwitch
Piezo In
Mid Boost or
Push/Push Vol Pot
Stereo Jack
Power/Battery
BLACK
Acousti-Phonic
Pre-amp
(PE-0210-00)
GHOST
Saddle Pickups
Pin Connector Colour Codes.
Note Black Ground leads ALWAYS on left.
Dual Connector
Teon Cable Assembly
(BE-5021-00)
Pieze
Balance
Control
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Remove the strings and the bridge saddles from the guitar.
Remove the pick guard assembly.
Cut six tiny grooves at the bottom of the underside of the pick guard with a
round le or a Dremel tool, closest to the bridge, so that the pickup wires can
slip easily into the pickup cavity (Diagram 1). This step may not be necessary,
depending of the closeness of the t between the pick guard and the guitar
body.
Install the GHOST Pickup System saddles on the bridge plate.
Connect the wires from the pickups to the common connector block. Be sure to
match correct lead color to string (see Pickup Color Codes, page 22).
Arrange the pickup wires so they will align with the grooves in the pick guard.
Arrange the wires in the pickup cavity so that they will not be damaged when
the pick guard assembly is replaced.
Connect the dual connector cable assembly to the spare position on the
common connector block and route the other end through to the control cavity.
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STEP 1: Installing the GHOST Pickups.
Strat® Style Instruments
Inside the Pickup Cavity Pickguard and Bridge Plate
Pickguard grooves detail
Connector
Block
Grooves in
Pickguard
READ THOROUGHLY BEFORE INSTALLING.
See tips on Page 22.
Diagram 1.
EADGBE
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Remove the strings and the bridge saddles from the guitar.
Remove the entire bridge assembly.
Remove the pickup from the bridge plate.
Install the GHOST Pickup System saddles on the bridge plate. Route the wires
through the pickup hole (Diagram 2).
Re-install the pickup on the bridge plate.
Connect the wires from the pickups to the common connector block. Be sure
to match correct lead color to string (see Pickup Color Codes, page 22).
Connect the dual connector cable assembly to the spare position on the
common connector block and route the other end through to the control cavity.
Re-install the bridge assembly, arranging the pickup wires so that they are
not damaged.
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Tele® Style Instruments
Inside the Bridge Cavity
Bridge Plate
Alternatively, the pickup wires may be
routed through individual holes drilled
beneath each saddle in the bridge plate.
IMPORTANT: Be sure to set your intona-
tion before drilling holes in baseplate.
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Diagram 2.
EADGB
E
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Remove the strings and the bridge saddles from the guitar.
Remove the entire bridge assembly.
Drill holes in the bridge plate beneath each saddle, after setting intonation, to
allow the pickup wires to be routed through to the bridge cavity (Diagram 3).
Install the GHOST Pickup System saddles on the bridge plate. Route the wires
through the new holes.
Connect the wires from the pickups to the common connector block. Be sure
to match correct lead color to string (see Pickup Color Codes, page 22).
Connect the dual connector cable assembly to the spare position on the
common connector block and route the other end through to the control cavity.
Re-install the bridge assembly, arranging the pickup wires so that they are not
damaged.
Jazz® or Precision® Style Instruments
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Remove the strings and the saddles from the guitar.
Remove the bridge pickup.
Install the GHOST Pickup System saddles. Route the wires through the pickup
cavity.
Re-install the bridge pickup.
Connect the wires from the pickups to the common connector block. Be sure
to match correct lead color to string (see Pickup Color Codes, page 22).
Connect the dual connector cable assembly to the spare position on the
common connector block and route the other end through to the control
cavity. Re-install the bridge assembly, arranging the pickup wires so that they
are not damaged.
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Les Paul® Style Instruments
Bridge Plate Inside the Bridge Cavity
Connector
Block
Diagram 3.
EADG
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STEP 2: Installing the Stereo Jack
Disconnect the wires and remove the existing output jack from the guitar.
Install the new stereo jack. The stereo jack is the same physical size as a
standard stereo jack and should t in most guitars without requiring any
physical modications.
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STEP 3A: Wiring without a Pre-Amplier
If you are installing the Acousti-Phonic Intelligent Pre-amp, skip to STEP
3B, page 12. If you are not installing an Acousti-Phonic Intelligent Pre-amp, the
guitar may now be wired using the passive volume potentiometer (pot).
The volume pot is most conveniently installed in place of an existing pot. For
Tele® style instruments this will likely be the Tone control. For Strat® style instru-
ments this will likely be the second Tone control.
The replaced control may be sacriced, or it may be moved to share a knob with
another existing control by tting a push-pull double pot or similar arrangement.
Alternatively, if there is room, a new hole may be drilled and an entirely new pot
may be added.
Regardless of the arrangement chosen, it is important that the volume pot used
for the GHOST pickups is a 5 Mega Ohm type. Lower value types are not suitable
due to the very high impedance of the GHOST pickups.
The diagram below (Diagram 4) shows the schematic for an installation with a
passive volume control.
Install the volume pot.
Schematic
GHOST
Pickups
From Mag
Pickups
330pF
5M
GHOST
Volume
Stereo Jack
Ring
Tip
Shank
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Diagram 4.
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Find the magnetic (mag) pickup signal wire that you disconnected from the
old output jack, which will likely come from the centre contact of the existing
volume pot. Route the wire to the stereo jack and solder to the tip contact of
the jack.
Cut off the (unused) connector on the end of the dual connector from the
common connector block and solder the cable to the top contact of the new
volume pot (see Diagram 14, page 22, for pot contact key). The shield may be
connected to the bottom contact or the body of the pot.
Solder a shielded cable to the center contact of the new volume pot. The shield
may be connected to the body of the pot. Route the cable to the stereo jack.
Cut to length and solder to the ring contact of the jack. Solder the shield to the
ground contact of the jack.
Solder the capacitor between the top and centre contacts of the new volume
pot.
Solder a wire from the body of the new volume pot to ground (for example, the
body of another pot).
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The wiring diagrams (Diagram 5) below show the GHOST volume pot installed
in place of an existing Tone control. For clarity, the wiring diagrams highlight the
new wires.
Magnetic
Volume
Magnetic
Tone
GHOST
Volume
GHOST
Pickups Ring
Tip
Strat Style Instruments Tele Style Instruments
Tip
GHOST
Volume
Ring
GHOST
Pickups
Magnetic
Tone
Diagram 5.
Indice
