Case

I have bought a broken Tape on Ebay. Tapes are dirt cheap, have oviously the right size and looks for a hifi brick.

Power supplies

In the 70's, audio amplifier where unnervingly complex beasts. This one uses two so called a " Sziklai pair" (which are essentially posh darlington pairs) in a push-pull configuration per channel. As a result, each channel has two large power transistors to cool. And two smaller ones, which, due to the weirdnes of the Sziklai pair, have to be cooled independently. Not to mention the transformer, a huge 4 pound chunk of metal.
A transformer of this size will happily humm away some watts just sitting there. The assembled amplifier burns 20 watt. Using Mr. Chunky to power the slug is out of the question. It would be hilarious. A neat, modern switching power supply seems mandatory.
The large Transformer is the original part from the braun. Heavy Metal, man! Its mounted by some metal brackets. I made these brackets and some other out of those perforated stripes of pot metal that are used in construction kits for children. The puny one is a 5V wall wart, left over from whatever. I cut off its plug and glued the rest to the case.
The blue circuit board is a cheap chinese relay board from  Amazon. Why, yes, i am lazy. Its mounted with 4 spacer screws to the ground.
I use shrink wrap and soldering eyelets to organize and isolate the primary side wires.

The Transformers secondary wires where isolated by some strange, brittle material in which i did not had too much trust. I used extra guides to minimze movement and contact. Each supply has its own fuse.

Amp

I had two aluminum heat sinks that where about as large as the one originaly used by braun. The case had no air vents, and with the large power brick already inside i decided it would be best to mount the heat sinks outside, with a large rectangular hole in the case to mount the power transistors through. Remember to use glimmer and plastic washers!

Slug

The Slug's mount is made from the same perforated plates i already used for the large transformer.

Overview

Lots of wire guides, glue, shrink wrap and screws. Not too screwed up though!

I put some extra plastic around the mains wiring. Just in case.

Early test

With the now discarded first interface. Pretty ugly :)

Front

The front had a lot of bobbly stuff on it, all of it could be removed easily or by force. So i was left with a flat but cheesy surface. As a means of decheesing i cut out some pieces of plywood to fill the holes.

After epoxying the plywood into place and some heavy sanding i used plaster and more sanding to get a nice surface