Here's a closer look under the hood.
I believe traps have been added to the IF coils and some sort of filter to the mixer grid bias.
The big white 3.3uH inductor is open so the mixer grid is floating right now. That can't be good
.
Here's a stock TS-18 for comparison.
Notice there are no tuning slugs on the IF coils and no inductor to the mixer grid.
Also a few caps are mica vs ceramic.
