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The booster acts as an amplifier between the power supply and the track. You should be able to use the same power supply for the booster and other components. Depending on how big your track is, you may only need one booster. See "Digital Command Control the Comprehensive Guide to DCC" pages 40-41 for a discussionon how much power one booster can hold. <br /> <br />Apparently the reason the power supply is sold separately because of Underwriters Laboratories (UL) approval required in the US - Many of the parts are sold all arouond the world, but in the US, strict power/codes are required, so the power supply is sold separately. <br /> <br />Also, components are interchangeable to the extent they meet NMRA standards, but its probably best to stay with the same manufacturer.
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