Yellow team, look at the relay next to the plug over there The voltage of 12V is 12V, and the voltage of 24V is 24V, but the withstand voltage of capacitors is mostly 12V. The white wires supplying power to 1875 and 1876 shall be double15v ~18v according to the capacitance withstand voltage; According to the capacitor withstand voltage, the blue wire that supplies power to Toshiba tube should be double 28V. The black wire is the midpoint of the white wire and the blue wire, and they are all connected together.
Ring transformer, that is, ring transformer, is used as power transformer in power amplifier. 220V AC power supply voltage is converted into DC power for power amplifier to supply power to the whole machine after voltage reduction and rectification by transformer.
Ring transformer is named after the use of ring iron core, which is a kind of electronic transformer. Because of its advantages of no magnetic gap, small magnetic resistance, small magnetic leakage, few turns per volt, small copper loss and high efficiency, it is widely used in medical devices, telecommunications, instrumentation, lighting and other fields.