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Recommended
Switching Power Supplies A - Z, Second Edition
Switching Power Supplies A - Z, Second Edition, by Sanjaya Maniktala (Newnes), starting at $54.35
Home » Power
Rocketfish 550 W Power Supply Review
Author: Gabriel Torres
Type: Reviews Last Updated: June 30, 2009
Page: 3 of 9
Transient Filtering Stage
Hardware Secrets Golden Award

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.

The transient filtering stage from this power supply is very simple but carries all recommended components, plus two extra Y capacitors and one extra X capacitor. The MOV is located on the right side of the right coil in Figure 8, covered by a black rubber protection.

Rocketfish 550 W power supply
click to enlarge
Figure 7: Transient filtering stage (part 1).

Rocketfish 550 W power supply
click to enlarge
Figure 8: Transient filtering stage (part 2).

In the next page we will have a more detailed discussion about the components used in the Rocketfish 550 W.

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