In the lower left corner is the wiring diagram. Some transformer secondary windings are lead wires (S0 is directly nailed to the transformer core), and the terminal structure is shown in the diagram. Similarly, the lead wires of filament coils are generally red, red, black, red and white silica gel wires, and there is a wire core with a diameter of 1.0 inside.
Extended data
The role of the capacitor:
1, coupling: the capacitance used in the coupling circuit is called coupling capacitance, which is widely used in resistance-capacitance coupling amplifiers and other capacitive coupling circuits to block DC and AC.
2. Filtering: The capacitor used in the filtering circuit is called the filtering capacitor. This capacitor circuit is used in power supply filtering and various filter circuits, and the filtering capacitor removes the signal in a certain frequency band from the total signal? .
3. Decoupling: The capacitor used in the decoupling circuit is called decoupling capacitor, which is used in the DC voltage supply circuit of multi-stage amplifier to eliminate the harmful low-frequency cross-connection between each stage amplifier.
4. High-frequency vibration elimination: The capacitor used in the high-frequency vibration elimination circuit is called high-frequency vibration elimination capacitor. In the audio negative feedback amplifier, in order to eliminate the possible high-frequency self-excitation, this capacitor circuit is adopted to eliminate the possible high-frequency howling of the amplifier. .
5. Resonance: Capacitors used in LC resonant circuits are called resonant capacitors, which are needed in LC parallel and series resonant circuits? .
6. Bypass: The capacitor used in the fibrechannel is called a bypass capacitor. If it is necessary to remove the signal in a certain frequency band from the signal in the circuit, a bypass capacitor circuit can be used. Depending on the frequency of the removed signal, there are a full frequency domain (all AC signals) bypass capacitor circuit and a high frequency bypass capacitor circuit.
7. Neutralization: Capacitors used in neutralization circuits are called neutralization capacitors. This neutralizing capacitor circuit is used in radio high-frequency and intermediate-frequency amplifiers and TV high-frequency amplifiers to eliminate self-excitation.
8. Timing: Capacitors used in timing circuits are called timing capacitors. The timing capacitor circuit is used in the circuit that needs time control through capacitor charging and discharging, and the capacitor plays the role of controlling the size of time constant.
9. Integration: The capacitor used in the integration circuit is called the integration capacitor. In the synchronous separation circuit of potential field scanning, the field synchronization signal can be extracted from the field composite synchronization signal by using this integrated capacitor circuit.
10, differential: The capacitor used in differential circuit is called differential capacitor. In order to get the spike trigger signal in the trigger circuit, this differential capacitor circuit is used to get the spike pulse trigger signal from various (mainly rectangular pulse) signals.
1 1, compensation: The capacitor used in the compensation circuit is called compensation capacitor. In the bass compensation circuit of the card holder, this low-frequency compensation capacitor circuit is used to boost the low-frequency signal in the playback signal. In addition, there are high-frequency compensation capacitor circuits. .
12, bootstrap: The capacitor used in the bootstrap circuit is called bootstrap capacitor, which is commonly used in the output stage circuit of OTL power amplifier to slightly increase the positive half-cycle amplitude of the signal through positive feedback.
13. Frequency division: The capacitor in the frequency division circuit is called frequency division capacitor. In the speaker frequency division circuit of the sound box, the frequency division capacitor circuit is used to make the high frequency speaker work in the high frequency band, the intermediate frequency speaker work in the middle frequency band and the low frequency speaker work in the low frequency band.
14. Load capacitance: refers to the effective external capacitance that determines the load resonance frequency together with the quartz crystal resonator. Common standard values of load capacitance are 16pF, 20pF, 30pF, 50pF and 100pF. The load capacitance can be properly adjusted according to the specific situation, and the working frequency of the resonator can generally be adjusted to the nominal value through adjustment.
References:
Baidu encyclopedia-capacitor