How to add a rectifier to #445 Lionel Switch Tower?

[lionelsoni]

You will need to isolate the coil and the lamp from each other.  Right now they share a common return through the frame of the accessory.  (If this proves to be not so simple, you might consider abandoning the original lamp socket and finding a place to install another with insulated terminals, like this one:  http://www.radioshack.com/product/index.jsp?productId=2062369 .)

Power the lamp directly from whatever accessory supply you are using.  Power the coil through the bridge rectifier, that is, with + and - connected to the coil and ~ connected where you used to have terminals 2 and 3.

[ballastbob]

 Id like to quiet down the operation of my Lionel Switch Tower by adding a full wave bridge rectifier (4 amps, 50 volts).  Im using an isolated control rail section. The tower, however, has three terminals: one for power, one for the control wire and one for the light.  How do I make the connections to the rectifier in this situation?

Bob