I had a problem when a plume of red fire came from the open vacuum system and my regulator 10 K pot used to set the power level fried. The content of the reaction vessel was air….
It was very sudden after the exciter had been running for some time so I am unsure what happened.
Dr Chris
http://www.cs003o327.webspace.virginmedia.com/
I wired the connection incorrectly because I was tired. I was trying to set the level that turned on the triac shunt.