LR Baggs Buffer Jack - Manual

tip side
ring side
pickup ground braid
hot
fig. 1
I N S T A L L A T I O N M A N U A L & U S E R ' S G U I D E
L . R . B A G G S P I C K U P S
B U F F E R J A C K
4 8 3 N . F R O N T A G E R D .
N I P O M O , C A 9 3 4 4 4
W W W . L R B A G G S . C O M
O V E R V I E W
The Buffer Jack will allow you to run a passive guitar pickup and a secondary
source (mini mic, magnetic pickup, etc) through the same stereo cable
without the mic bleeding into the pickup channel (a phenomenon known as
crosstalk), and without a battery on your guitar.
Important: The Buffer Jack is designed to work with the Mixpro. We do not
guarantee that the Buffer Jack will be compatible with any other
manufacturer's equipment. Additionally, L.R. Baggs assumes no responsibility
for any damage to the guitar or personal injury resulting from installation,
improper installation, use or misuse of the product.
I N S T A L L A T I O N
1. Drilling: For proper installation, this jack requires a clean 1/2" hole in the
tailblock of the instrument. If the guitar lacks this hole, start by placing a
piece of masking tape on the outside of the guitar over the drilling area (to
avoid clipping the finish). Then drill a 1/16" pilot hole and follow with a step
drill.
2. Soldering: The jack is installed onto the guitar from the inside; solder the
pickup and mic wires to the jack before inserting it into the instrument. We
recommend using a cloth to protect the instrument's finish during soldering.
3. Connection procedure: Unscrew the metal cap from the Buffer Jack and
thread the pickup wire through it. Solder the primary pickup coax's central
(hot) wire to the square through-hole, and the ground braid to the larger
rectangular pad, as shown in figure 1. Clip the end of the hot wire close to the
PC board to prevent it from touching the metal cap or other parts.
Now thread the cable from the secondary source through the cap, and solder
to the other set of input pads. Figures 2a-2e show wiring diagrams for many
common type of mini mics. Again, clip all wire ends so they won't touch
anything.
4. Installation: Screw the cap back on and install the Buffer Jack in the guitar
as follows. Remove the strap ring, retaining nut and washer from the jack.
There should be one star locking washer, one flat washer and a nut remaining
on the jack.
Bring the jack down through the sound hole, into the body and insert it into
the pre-drilled hole in the tailblock. Next, using the internal nut (be sure to
include the flat and star washers), set the proper depth so nearly all of the
smaller threaded section to protrude from the instrument (see figure 3).
With the jack in place, lay the remaining washer over the threads and attach
the external retaining nut until it's tight. Finish by attaching the strap ring.
Make sure phantom power is on for both channels of your outboard
preamp/mixer. On the Mixpro, you'll need to remove the cover and set the two
phantom power switches as shown in the mixpro manual.
For best results, follow the instructions in the Mixpro manual and adjust the
rest of the "under the hood" controls, to optimize your pickup and
microphone settings.
Note: When combining a magnetic pickup with the Ribbon Transducer, solder
the Ribbon to the top contacts as shown in figure 1, and the magnetic to the
ring contacts per figure 2e. Be sure the phantom power to the ring cannel in
the Mixpro is in the off position.
tip side
ring side
s
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ie
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re
d
w
h
it
e
fig. 2a: Crown
GLM-100/W (omni)
GLM-200/E (cardoid)
tip side
ring side
s
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ie
ld
w
h
it
e
re
d
fig. 2b: Joe Mills/Sony
ECM-44pt
tip side
ring side
s
h
ie
ld
p
in
3
p
in
2
fig. 2d: Shure
SM-98
tip side
ring side
s
h
ie
ld
g
re
e
n
re
d
fig. 2c: Countryman
Iso-Max
tip side
ring side
s
h
ie
ld
s
ig
n
a
l
fig. 2e: Mics with 2 wire output
such as AKG C406/B
fig. 3