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Reply to "install ps1 in older lionel switcher"

If you are using an MTH bottom board with plugs you should be fine on current as the diodes were 6amp versions.  The really issue is the MTH PS-1 board is for a DC motor and you are modifying an AC motor.  So it gets tricky using the DC reverse unit.  You do need to add a bridge rectifier to keep either the field or armature current in the same direction while allowing the reverse unit to switch the one not chosen for constant current direction.  This works I have used DC reverse units on Lionel AC engines.

 

Also the PS-1 are quite reliable and hardy.  Also still supported with parts via MTH.  They are older technology, and you do need to keep a charged battery or use a BCR, but I sense you already have that covered.  If you do A SEARCH I think you can find some topic on the AC otor run by DC reverse unit.  G

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