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.
On this stage Huntkey Green Star 450 W is flawless: it has one extra ferrite coil, two extra Y capacitors and one extra X capacitor.
When we first posted this review we said that this power supply didn’t have a MOV. In fact it has two MOV’s but since they are located in a non-traditional location (after the rectifying bridge and not before as usual) we didn’t see them at the first time we disassembled this unit. We ask you our sincere apologies for this mistake.
A very interesting feature from this power supply is that its fuse is inside a fireproof rubber protection. So this protection will prevent the spark produced on the minute the fuse is blown from setting the power supply on fire.
In the next page we will have a more detailed discussion about the components used in the Huntkey Green Star 450 W.