ONBOARD ACOUSTIC GUITAR PREAMP
WARNING
INSTALLATION BY A QUALIFIED PROFESSIONAL REPAIRMAN IS STRONGLY
RECOMMENDED. FISHMAN TRANSDUCERS WILL NOT BE RESPONSIBLE FOR ANY
DAMAGES TO YOUR INSTRUMENT DUE TO IMPROPER INSTALLATION.
2. TEMPLATE
A drilling template is provided for drilling the control shaft holes. Cut out the template outline. Check that it fits between the upper and lower linings when held inside the guitar at the chosen location. Tape the template at the location on the outside of the guitar. With a sharp scribe, pierce the tem- plate at the marks. Remove the template. This should provide you with two drilling centers marked on the side of the guitar. These centers will be 1.250 inch (31.8mm) apart. At each center, drill a .375 inch (9.5mm) hole through the side of the guitar. We recommend using a sharp 3/8 inch spur bit for this operation.
FIG. 1
3.SPACER BLOCK
We strongly advise that a wooden spacer block (see Figure 1) be used to add
strength to the mounting area of the guitar and to more evenly distribute the load of the pre-
amp. We do not recommend
using a hex nut and lock washer as the inside bearing surface to accommo- date the thickness of the inside of your instrument because this could result in possible damage to the instrument itself
4. PREPARING THE SPACER
Using the drilling template as a guide, make a rectangular wooden spacer that is 2.00 inch x .750 inch x T (50.8mm x 19.0mm x T). T is the measure- ment derived from the protruding bushing length minus the outside hard- ware thickness (Figure 1) To derive T, insert the control shafts through the
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