The inside of case with valve chassis removed….

The fabric on the fascia was fully glue’d and no way to remove it. The brass-like trim wil be kept and refitted to the new fascia panel.

Using the old panel (5-6mm thick) as a template allowed me to cut a new panel from 9mm plywood. The oval loudspeaker will be removed and replaced by 2 x 3″ Faital Pro 3FE25 20W at 8Ω impedance.

 

New internal hardware

Fascia

The new fascia cut from 9mm plywood…

The plywood baseplate – required for mounting any electrics etc to….

 

The speakers mounting holes, marked for the Faital Pro’s….

The speaker holes cut with my Bosch 70mm hole cutter. T-nuts (M5x8mm) are used to mount the speakers to the fascia.

To fit the T-Nuts, it is better if they sit flush with the front panel when hammered-in. Start by drilling through a 1mm pilot hole, then on the ‘front‘ drill a 10mm recess, 1mm deep  with a 10mm Forstner bit. Finish by drilling through with a 5mm metal bit. Slightly widen with a round wood file before fitting an hammering home.

 

The Baseplate

The plywood baseplate – required for mounting any electrics etc to….

 

How the fascia and baseplate sit inside the case…