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Home » Power
Spire BlackDragon 400 W Power Supply Review
Author: Gabriel Torres 14,395 views
Type: Reviews Last Updated: September 13, 2012
Page: 3 of 11
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 the transient filtering stage, this power supply is flawless, with one X capacitor and two Y capacitors more than the minimum required.

Spire Black Dragon 400w
click to enlarge
Figure 9: Transient filtering stage (part 1)

Spire Black Dragon 400w
click to enlarge
Figure 10: Transient filtering stage (part 2)

On the next page, we will have a more detailed discussion about the components used in the Spire BlackDragon 400 W.

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