Semprini, DIY Quad Tape Player

Abstract

Semprini is a brand of audio gear, active in Italy in the '60 and '70s.

They mainly focus on mixers and gear for broadcast market. The mixer was found in a dumpster an the most parts of it was not recoverable. However, the jingle mechanics seems to be in a decent shape. The schematics seems to be impossibile to find, so a little bit of reverse engineering was required in order to find the correct power supply voltages, and the troubleshooting was not so easy.

Once the electrical and mechanical functionalities was restored, I've created a wooden case, a 3d printed logo using original artwork as template, and I made some mods, like the possibility to change the tape speed using a pot.
The performance La Portata di un Condotto was the first one that uses this quad tape player.

Photos