Quad speaker repairs

Quad 63 Pal, Norway

Hi!

Last week I finished my project in repairing one of my Quad ELS 63’s. It took me every evening for a week to change diaphragm for three elements in one speaker.

I tore up seven diaphragms during tensioning (some swearing here)

I didn’t do any testing before assembling the speaker, so it was very exciting to finally turn it on!

But all the labor was worth while. I now have a new speaker !!

The first day. Stripping the speaker.

Equipment in use.
One of the original diaphragms. Notice the coating in the corners.
Two burn holes in one of the diaphragms
Burn mark in the corresponding copper stator.
Honey com -matrix with glue residue.
Burn mark in the damping gauze.
Diaphragm where the panel outline is marked.
The diaphragm are tensioned.
Books as weight during curing the diaphragm to the air-gap spacers.
Three diaphragms are coated and ready for reassembling
The hole made in the diaphragm around the center air-gap spacer made with the soldering iron.
The conductive coating in the corners. Here I have applied the coating in the same way as the original corners.
All the elements are reassembled.
Tensioning the dust covers.
The dust cover frames cleaned and ready.

Thank You for the eminent instructions and for this great opportunity to fix the speakers at a low cost.

Best regards

Pål (Pal’s surname has been withheld for privacy reasons)

Some of the contents from the repair kit and a couple of panels.

Diaphragm Damage caused by stator to stator arc.

Burned stator caused by arcing. Note the damping mesh on the surface

This stator has suffered glue failure and has broken loose from the support panel. This has allowed it to become too close to the other stator causing the burning at top centre.