Wattkins Junior Chassis

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Joined: 05/26/2007

Updated: June 12th 2014

This is our heavy duty Junior chassis. We've taken what we've learned from the larger Universal chassis and created a 12.25" x 6.875" x 2.75" chassis that is fully compatible with our Universal PCB and Tweed 5E3 PCB, as well as Epiphone Valve Junior-sized cabinets. The chassis contains pilot holes instead of fully drilled holes for maximum flexibility. The chassis can be easily drilled to install boards from Guitaramplifierpcbs.com and Turretboards.com as well. CAD layout by particle.

Current Status:
Our first delivery of 25 chassis has just arrived. We are now taking orders!

Obtaining the Wattkins Junior Chassis:

Now shipping! You can buy the official Wattkins Junior Chassis here:

Development Discussion:

Project information: (this page)


Length: 12.25"
Width: 6.875"
Height" 2.75"
Thickness: 0.090"
Material: Aluminum

Front panel:

  • 8 pilot holes arranged 3 + 5 for switches/lamp and pots/jack(s)

Rear Panel:

  • 1x hole for IEC power socket
  • 2x pilot holes for fuse holders (optional)
  • 3x holes for 4Ω, 8Ω, & 16Ω output (Switchcraft-size - will need to be enlarged for Cliff)

Top panel:

  • 15 pilot holes which can be used for the following:
    • Up to 4x holes for tube sockets
    • 7x holes for mounting the Univeral PCB
    • 1x input jack ground
    • 1x output jack ground
    • 2x grounds near IEC power socket


We added an extra mounting feature - side mounting holes for cage nuts - to allow a cabinet base to be attached separately from the rest of the cabinet which allows easy access to the inside of the chassis.

Design Drawing:

Wattkins Junior Chassis Drill Plan (pdf)

None yet!

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