Hi, Just spent a while browsing and can't find a schematic or data for a GE TC-2 (NOT Heathkit) Tube tester. Seems to work OK except for the line adjust being off.
If I adjust the line adjustment to give me the correct filament voltage the unit seems to work fine but line adjust meter reads around 34% vice 50%. I'm thinking it's a resistor that changed value. The unit does use a 171A tube for the rectifier. Will try a known good one and see if that helps. A schematic would be greatly appreciated!