Revox Amplifier Repairs

Revox B251

Revox B251 Rectifiers

This was dead and in need of repair, one of the secondary rectifiers was s\c and had taken out one of the chopper transistors. The chopper\inverter runs all the time there is mains input. The PSU runs at about 22k and high frequency rectifiers are used (RKBPC602), later the mains filter capacitor expired with a bang, when all put back together sounded fine, then the real trouble started sorting all the pre-set volume levels out!