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Picture of Make a Guitar Amplifier Motherboard out of Phenolic
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First of all, I made this at TechShop Detroit. All of the tools used can be found in the shop, which is pretty awesome. The link for techshop is here:

www.techshop.ws

I am building a guitar amplifier from a kit, and the motherboard was made of cheesy cardboard.  I decided to make mine out of phenolic. This is one of my favorite materials to work with because is is easy to machine, and it looks beautiful. In this instructable, I will run through the steps for laying out the new motherboard and drilling/cutting it out. The phenolic I am using was salvaged from an old transformer. (Recycling... Yay!)

Tools needed:
Transfer punches
Ball-peen Hammer
drill bits
calipers
Phenolic Sheet
Template
Hand Clamps
hand Scribe
drill press
BandSaw
Belt Sander

Step 1: Mark with a Scribe

Picture of Mark with a Scribe
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The first thing I did was mark the edges of the template using a scribe.
 
davidm2005 months ago

sweet.... but remember creepage.... the current CAN and sometimes WILL creep across the board in high voltage applications such as vacuum tube amps... thats one of the reasons Fender choose the fiber board (basically cardboard)

Nice how to. Please be advised that phenolic is a carcinogen and use of a respirator is highly advised during forming operations (to include sanding).