Punch

 

How To: Punching a Blank Chassis with a Custom Control Layout

When you want to design a prototype for a custom amp, it is almost impossible to find a pre-punched chassis that can be easily adapted to match your control layout. To get around this, you?ll need to drill and punch your control layout on a blank chassis. You can obtain a blank chassis in a wide variety of sizes from a number of online amplifier parts merchants like Watts Tube audio and Tube Amp Doctor. When I was doing my first prototype amp, I decided to get an aluminum blank chassis in the same size and shape as a traditional Marshall 100 watt Super Lead.