Fishman POWERJACK INSTALLATION GUIDE

POWERJACK

REV. 2.3

PJ FISHMAN

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G

IN

R

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G

G

N

I

IN

R
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R
IN
G

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F
H
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A
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O
W
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C
K

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Battery Bag

Pickup

Powerjack

INSTALLATION GUIDE

www.fishman.com

Read Me First!

Installation of this product is a simple procedure,
but we recommend this job only if you are an
experienced repair technician.

Preliminary

Widen the endpin hole to 15⁄32” (11.9mm) to
accommodate the endpin jack.

If using the Powerjack with new pickup, install pickup
according to its provided instructions.

Installation

Observe the following
precaution!

• Do not overheat the solder pads! Doing so
may lift the pads from the circuit board.

Solder the wire connections

1. Unscrew the shielding cap to access the preamp
circuit board.

2. Strip ¼” off the outside jacket of the pickup wire.

Tin both the inner conductor and the ground wire.

3. Thread the pickup wire through the shielding cap.

4. Thread the pickup wire through the largest of the
three strain relief holes, then solder the signal wire
from the pickup (hot wire) to the pad marked “IN”
on the preamp circuit board. Solder the ground wire
from the pickup (shield) to the adjacent pad marked

“G” on the preamp circuit board (fi gure 1).

5. Fasten the shielding cap to the jack. Be careful
not to allow the shielding cap to come in contact
with the end of the circuit board.

6. Lock the shielding cap to the fi rst large hex nut.

Endpin jack

Install the endpin jack per Switchjack Installation
Guide.

Battery bag

Install the battery bag on or near the neck block
(fi gure 2).

Figure 2

Figure 1

Pickup Shield

to Ground ("G")

Pickup Signal

to "IN"

1. Clean the area where you will mount the bag
with an alcohol wipe or cotton swab moistened
with rubbing alcohol. Let dry.

2. Peel off the plastic fi lm from the Velcro patch and
attach the bag at the chosen location.

1

3. Carefully separate the bag from the Velcro patch.

REV. 2.3

PJ FISHMAN

+

G

IN

R

-

To set the adhesive, burnish the entire area of the

patch, especially the edges.

4. Install a 9V alkaline or lithium battery. Tuck the
battery into the bag and re-attach to the Velcro
patch. The adhesive under the Velcro patch requires
24 hours to achieve a full bond, so take care to not
stress the adhesive if you remove the battery bag
after the initial installation.

Second pickup source option

A second source such as a microphone or magnetic

soundhole pickup may be added (fi gure 3). The
output will appear on the ring connection when a
tip-ring-sleeve ¼” jack is inserted.

For specifi c wiring diagrams, refer to fi shman.com.

2nd Pickup Shield

to Ground (“G”)

Pickup Shield

to Ground (“G”)

Pickup Signal

to “IN”

2nd Pickup Signal

Figure 3

to Ring (“R”)

Specifi cations

Power Supply: 9 Volt alkaline battery

Battery Life: 2,000 hours

Maximum Output
Voltage: 4V peak to peak

Input Overload: -.7dBV

Input Impedance: 10MOhms

Output Impedance: Less than 5kOhm

System Gain: 3dB

Signal-to-Noise Ratio: 94dB

Discrete Component
Design: FET low noise class A
input stage, bipolar class
AB output stage

www.fi shman.com

514-300-114 Rev A 5-09