6Z4 rectifier tube application

GW MB10F 0.8A 1000V rectifier bridge

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Filter 18.432M

Figure 1 shows a typical full-wave rectification circuit. Point A is the anode of the power amplifier tube, while point B represents the preamplifier stage. The primary winding of the output transformer functions as a filter inductor, and a 20μF filter capacitor is sufficient to eliminate hum, even when using a 10μF capacitor. This setup ensures stable power delivery without noise.

In Figures 2 and 3, a bridge rectifier is necessary because the transformer does not have a center tap. However, the high internal resistance of the vacuum tube and the significant voltage drop make it unsuitable for direct bridge rectification. To address this, two 1N4007 diodes and a 624 resistor are used to form a bridge rectifier, which helps reduce inefficiencies and improves overall performance.

Figures 4 and 5 are designed for power transformers that do not provide a 5V filament supply. Figure 4 is ideal for dual-channel power amplifiers, where both power supplies are well-matched in terms of parameters. The output current in Figure 5 is similar to that in Figure 3 but higher than that of a single 5Z4P rectifier. Additionally, the heating power of the two tubes used in this configuration is less than 8W, which is more efficient than the 10W of a 524P tube.