
DRILLING GUIDANCE FOR POTS and LED
We suggest you print this and use as a template for drilling your enclosure. When printed, the green border of the board should
measure 1.9 x 1.65 inches, i.e.: 42 x 48mm. NOTE: Pick the drilling template that matches your circuit board. A small quantity of
prototype boards, which were rectangular, were sold. The newer revision (at right) has slightly angled pots to provide a little more
space between knobs, but is functionally identical to the prototype board (at left).
Prototype: 1.9 x 1.53 inches
48 x 39mm
Revised PCB: 1.9 x 1.65 inches
48 x 42mm
Note: Only Drill the LED hole displayed above if you plan to use the status LED on the Zenith Pro circuit board!
This drawing shows the spacing between centers of the pots, and the distance of the LED pads from the center of the pots. Hole
diameters are not exact in this image, so please measure your components before selecting a drill bit. We recommend drilling the
pot holes, mounting the pots in the enclosure, and then soldering the pots to the board. This approach should resolve the issue of
the pots not fitting through the holes after soldering. We also recommend you make the holes for the pots a little larger than the
threads in case you decide to remove the board and put it back in during the build, to avoid problems. Use this guide at your own
risk. Be sure to make sure page scaling is turned off when you print this PDF, or the image above may be smaller than expected.
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