Heathkit TT-1 Leakage Test??

[Winky Dink]

I restored the TT-1 four years ago. Lately the rotary switches have become stiffer, so I pulled the chassis to lubricate them. That worked well, BUT...then I decided to rerun all the calibration and verification procedures.

To get to the point, I get mixed results on the leakage test verification. The instructions are to verify the leakage detection on any one single tube socket but I went ahead with four sockets, hoping to find some pattern. These are the results:




I'm hoping that someone familiar with the circuitry can see a pattern in these results and give me some direction. I've spent several days trying to work this out, but I can't even see the tube sockets on the schematics. Last night I even tried changing my socks, but that didn't help.

So, please, if anyone can see a possible single fault that would explain the results, let me know. Otherwise I'll put the chassis back in the box and go ahead in blissful ignorance.

Thanks,
Henry