57-TW/66-TW SET INSTRUCTIONS Page 2
Using the Pot Section as:
1) The Pickup Volume control, or a Master Volume for the Instrument.
Refer to Diagrams #3 and #4
The pot section (25KA) can be used either as a Volume control
for the pickup or, it can be used as the Master Volume for the guitar.
Diagrams #3 and #4 show how to connect either option.
Use the dual-line 12-pin header and push the cables on and
install the shunts as needed onto the labeled headers H1 thru H6.
Use Diagram #3 if you have a single TW installed in your instrument,
or have two or more pickups in your instrument and want to use the
pot as the Volume control for the TW Pickup only.
Installing the shunts on positions H4 and H6 sends the pickup signal
to the wiper of the 25K Pot, and the output of the 25K Pot is at position
H1 or H2.
Diagram #4 allows you to use the 25K Pot independently of the pickup output.
By taking the output of the pickup from position H5, the Volume control is now
available to use as a Master Volume with H1 or H2 being the input to the Volume
control. H1 and H2 positions are interchangeable.
Position H5, now the output of the pickup, would typically go to a selection switch
or a pan-pot. Don’t forget to install the shunt on H6.
Using the TW Push-Pull Pot Section
The Push-Pull Pot side of the EMG-TW allows you 4 different options:
1) Use the pot as a Master Volume for the Instrument
2) Use the pot as a Volume control for the TW Pickup
3) Use the pot as a Master Tone control for the Instrument
4) Use the pot as a Tone control for the TW pickup
On the PC Board there is a dual-line header with 6 pairs of pins. They are
listed on the PC Board as H1 through H6. By using the the connections
shown in Diagrams #3 through #6, you can choose any of the 4 options.
General Notes:
Every attempt has been made to make this a solderless installation.
There are some instances where this is not possible;
1) If your instrument uses the long panel output jack and you had passive pickups
you will need a new stereo output jack, the Switchcraft 152B is recommended.
Soldering to the new jack will be required.
2) Some instruments may already have a battery holder installed, in that case
soldering may be required.
3) Instruments with two pickups may need soldering to the selection
switch in some installations.
Using the TW Push-Pull Switch
The Push-Pull Switch included with the TW Pickup allows you to choose between
two internal pickups of the EMG-TW, single-coil and dual-coil. The Push-Pull Pot
has two seperate sections: The Switch and the pot, described below.
Refer to Diagrams #1 and #2
The Push-Pull Switch section (DPDT) lets you choose between the
single-coil sound and a dual-coil sound by pulling or pushing the pot shaft
up or down. You have the option of having the single-coil sound in either
the up or down position and vice-versa for the dual-coil sound.
Diagrams #1 and #2 show how to connect the TW Pickup cable to choose
either option. Select the diagram that suits you and push the cable
connectors onto the single line 6-pin header.
Simply turn over cable connectors 1 and 2 to change the wire order
and this will choose between the two options.
Connector 3 remains the same for either choice.
Diagram #1
HUMBUCKING ON: DOWN POSITION
SINGLE COIL ON: UP POSITION
Diagram #2
SINGLE-COIL ON: DOWN POSITION
HUMBUCKING ON: UP POSITION
FLIP CONNECTORS 1 AND 2
AS SHOWN
WIRE ORDER:
WHITE
GREEN
BLUE
YELLOW
ORANGE
SHIELD
WIRE ORDER:
GREEN
WHITE
YELLOW
BLUE
ORANGE
SHIELD
SHUNT ON (H6)
PICKUP OUTPUT (H5)
MASTER VOLUME
OUTPUT (H3)
MASTER VOLUME
INPUT (H1 OR H2)
Diagram #4
PUSH / PULL POT USED AS
THE MASTER VOLUME CONTROL
TO SELECTION SWITCH
(VIA B245 BUSS)
OR PAN-POT
PICKUP OUTPUT
(H1 or H2)
INSTALL SHUNT (H6)
INSTALL SHUNT (H4)
1
2
3
1
2
3
Diagram #3
PUSH / PULL POT USED AS
THE PICKUP VOLUME CONTROL
OR TO THE OUTPUT JACK IN SINGLE
PICKUP GUITARS WITH NO TONE
CONTROL
PICKUP OUTPUT:
TO TONE CONTROL OR
SELECTION SWITCH OR BUSS
FOR 2 OR 3 PICKUP GUITARS
