Heathkit T3 Visual Aural Signal Tracer

[Tubejunke]

Ok, I remember at some point the amphenol connector from the probe fell apart in my hand. The center conductor was not connected. I thought it was just wear and tear. So I soldered it back and that's when all the noise and having to keep the gain almost off came into play. I put a new .02mfd cap in and nothing changed even though the cap was very leaky on my Heathkit IT-28 at very low DC voltage. Finally I backed off the amphenol connector so that the center conductor wasn't contacting and everything normalized. There must be something wrong in the wiring of the probe. I will have to go through the schematic and see.