Vermes
Advanced Member level 4
This device was based on LM3875 in isolated version. Other elements:
- precise resistors Elpod
- bridge on MUR 860 diode
- filtering capacitors BC Components
The power amplifier was not to provide high power, filtering capacity of 2000uF is sufficient. You can create a „dual mono” system of two toroidal transformers. Those transformers should have a shield between windings. The boards were designed so as not to unnecessarily prolong the signal path.
Housings are made of aluminum, the rear wall is a heat sink. Transformers has 2x24V on the secondary windindg. Backlit switch is placed below the housing.
Pictures:
Link to original thread - Końcówka mocy do sypialni