I took inspiration from other keyholders made with jacks (or RJ45 ethernet connectors) and I decided to design this Marshall amplifier version for a friend of mine.

This project is not a simple print-and-assemble one, I had to use different materials and tools. Here you have the lists

In the .zip file you can find the entire 3D model in SW2020

Materials:

• Aluminum bar 2x 120x30x2 mm
• A piece of women sock (black)
• 4 female 3.5mm audio jack (stereo or mono is the same)
• 1 to N male 3.5mm jack to create your keychains (in the pictures you can see that I made an aluminum custom jack with the lathe just for fun)
• black, white and gold spray paint
• 4 wood screws 3.5x15 mm (or similar)
• superglue

Tools:

• Drill
• Drillbits (depending on the female jack size, 9mm in my case)
  • various diameter for the other holes
• File
• Countersink

Unfortunately, I don't have pictures of the making but I will give a written description:

1. Print the parts that have an stl file (case, handle, Marshall logo and logo backplate)
2. Using an aluminum bar and following the 2 PDF drawings, prepare the 2 plates (one to hold the 4 female jacks, and the other one to be screwed on the rear to attach the keyholder to a wall)
3. Paint the case and dhe handle in black, the front panel in gold, and the logo in white (you can smoot the surfaces with some acetone before painting if you print the parts in ABS to have a better-looking result)
4. screw the 4 female jacks into the prepared and painted panel. Then slide the panel in place.
5. cut a piece of women sock, wrap it around the logo panel and insert it inside the case from the back. The low clearance between the panel and the inside of the case, should hold the sock in place. This panel will prevent the gold jack panel from slide up.
6. apply the logo (again the 2 pins of the logo should fit forced in the holes of the plate so you should not need any kind of glue)
7. screw the back panel in place with the 4 screws
8. glue the handle in place with a drop of superglue. Be careful, superglue can turn the plastic white