These are great Variac's (when they work), however they are reported to have a high failure rate of the V/A meter + driver board. Unfortunately, these are made overseas. There is no documentation available. Parts are not easily located. So, when they fail, it leaves you in a lurch. I have one here which has the open meter. Instead of searching and installing another poor quality meter, I decided to modify the Variac with dual Simpson 1257 series meters! The project turned out great. I love the smooth operation and not needing to use the cheap switches to monitor voltage & current. If you decide to do this mod, buy the meters on ebay. They range around $20ea. If you buy them new, they are $130ea! I will be posting more updates to this unit in the near future. Enjoy!
8 июл 2024