Fixing the FAKE soundbox

Introduction

This tutorial provides a step-by-step guide on how to repair a fake gramophone soundbox. If you've encountered issues with your soundbox, this guide will help you understand the process of disassembling, fixing, and reassembling it effectively.

Step 1: Disassemble the Soundbox

• Carefully remove the diaphragm.
• If the diaphragm is stuck, avoid excessive force to prevent damage.
• Unscrew any screws holding the diaphragm in place. If the screw is resistant, check if the needle bar is twisting instead of the screw turning.

Step 2: Repair the Needle Bar

• If the needle bar has broken, you can either glue or re-solder the part back.
• Use a 4BA machine screw made of brass as a replacement:
  • Turn it down on a lathe.
  • Drill it with a 1mm hole.
  • Tap it to a 1.4 size.
• Use a suitable metric screw that fits well.
• Coat the screw with lubricant before soldering to prevent solder from filling the threaded portion.

Step 3: Replace the Gaskets

• Remove the old gaskets, which may be glued in place.
• Create new gaskets:
  • Use foam material for the top gasket and card for the bottom.
  • Draw around the old gasket to create a template.
  • Cut out the new gaskets. If they are too large, trim them down.
• Alternatively, use a circle cutter to create precise gaskets.

Step 4: Clean the Soundbox

• Thoroughly clean the entire casing to remove dirt and residue.
• Inspect for any remaining marks that could affect performance.

Step 5: Adjust the Needle Bar and Gaskets

• If the needle bar has changed in length, bend it carefully to fit.
• Punch screw holes in the new gaskets to align with the soundbox.
• Install the bottom gasket and insert the needle bar.

Step 6: Reassemble the Soundbox

• Secure the needle bar with the screw and washer. Be careful as small parts may be easy to lose.
• Use beeswax to seal the screw in place for a secure fit.
• Attach the back gasket and reassemble the soundbox.

Conclusion

Repairing a fake gramophone soundbox may seem challenging, but with careful disassembly, repairs, and reassembly, it is possible to restore its functionality. Key steps include fixing the needle bar, replacing gaskets, and ensuring everything fits snugly. For further improvements or different adjustments, consider exploring authentic soundbox parts or consulting with phonograph repair experts. Happy repairing!