I've decided to build a 3-500 tube tester and could use the following parts if anyone has some in their junk box: -Chimney -Filament transformer (6 volt transformer would work fine, I'm going to put a variac on the primary) -Eimac air system socket I could also use a 500 to 700 ma 1200 volt secondary 120 volt primary plate transformer. Thanks! 73 Jim W7RY