Huntkey X7 900 W Power Supply Review

Transient Filtering Stage

As we have mentioned in other articles and reviews, the first place we look when opening a power supply for a hint about its quality, is its filtering stage. The recommended components for this stage are two ferrite coils, two ceramic capacitors (Y capacitors, usually blue), one metalized polyester capacitor (X capacitor), and one MOV (Metal-Oxide Varistor). Very low-end power supplies use fewer components, usually removing the MOV and the first coil. 

In this stage, the Huntkey X7 900 W power supply is impeccable, with two Y capacitors and two X capacitors more than the minimum required. The unit also has a relay to shut down the power supply in case of any of the protection circuits kicking in.

Figure 8: Transient filtering stage (part 1)

Figure 9: Transient filtering stage (part 2)

Figure 10: Transient filtering stage (part 3)

On the next page, we will have a more detailed discussion about the components used in the Huntkey X7 900 W.