The stabilizer is made on the integrated circuit KR142EN6. IC is a bipolar voltage regulator with an output voltage of + / -15 V. Maximum load current is 200 mA. Enough to supply a pre-amplifier or the early stages of the power amplifier.
Diode bridge – any of a series of KTS407, KTS405, KTS402.
Transformer with two secondary windings, the voltage on each – 16 Volt.
Parts list : C1, C2 : 1000uF/25V C4, C5 : 1000 C3, C6 : 33uF/25V D1 : KTS407, KTS405, KTS402 IC1 : KR142EN6
