C32 class loco, flat truck and guard's van

A Power-Mains Stabiliser.

or if you want the full title

Twin Self-Regulating Power-Mains Auto-Transformers.

I recently came across the following information in a 1947 edition of an Australian Radio Handbook. It seems to be a solution looking for a problem. It can handle an input of 190v to 300v at 150watts.

Page 1 of the self-regulating transformer article
 
Page 2 of the self-regulating transformer article
 

  ©  Gary Yates   Locofonic Recordings Australia  
This page first written 3-4-2006 last updated 3-4-2006.