38 variac wiring diagram
Bare Variac Build: A Variac or autotransformer is something I've always wanted. They're an item I just don't see every day though in my travels. One day I did happen to come across one while I was shopping at a flea market. The fellow selling it wanted $5 for it whic… Staco VARIAC Variable Transformer 100 and 200 Series. These manually operated panel mounted Variacs are available in single and three phase models from 0.8 to 3.0 amperes. The 171, 201, 221-B and 291 units operate from 120 volt input, while the 252 unit operates from a 240 volt input. One of the simplest ways to make a battery powered High Voltage power supply is to use a common car ignition coil. Ignition coils are a type of induction transformer based on the Tesla Coil invented by Nikola Tesla in 1891. The voltage rise is not given by the turns ratio like in a standard transformer, but is proportional to the rate of change of current in the primary circuit. Variac wiring diagram