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The electrofrog is a bit more complicated to use, if you don't use a switch machine you should use a mechanical link to a microswitch to do the same function as the machine contacts. This removes the reliance on point to stock rail contact (which get dirty) for frog power. Rail gaps with insulated rail joiners are necessary if you apply power from the frog end such as a passing siding. <br /> <br />One nice thing about frog powering is the ability to route power to one of two diverging routes, but this can also be done by adding external switch contacts to the insulated frog turnout as well. The main advantage of the electrofrog is that all power pickup wheels are always in contact with a powered rail and the possibility of a slow moving locomotive stalling out is reduced.
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