Digitrax DB200+ LocoNet Booster.
  
Was used on my layout with no problems.

8 AMP AUTOREVERSING DCC BOOSTER (NO COMMAND STATION CABILITY)

USER SELECTABLE MULTI-SCALE OPERATION FOR N, HO, AND LARGE-SCALE LAYOUTS

LOCONET FOR EASYPLUG'N PLAY INSTALLATION & SYSTEM EXPANSION

 AUTO RESETTING OVER TEMPERATURE AND SHORT CIRCUIT PROTECTION

 TRACK STATUS INDICATOR

 STABILIZED TRACK DRIVE OUTPUT

 OVER-VOLTAGE PROTECTED

 AUTO SHUTDOWN WHEN COMMAND CONTROLSIGNAL IS LOST TO PREVENT "RUNAWAY" TRAINS