Back after a long hiatus... Admiral Tuner Help Needed

[UberVacTuber]

Dave, Thanks for the link- very informative. Up until now I've been scared of any alignment procedures, as a lot of the sources (on the internet) say best not to touch, as you may only make a working set non-functional. In this case, I have nothing audio to lose. I also have the same Heathkit signal generator and my DVOM has a frequency function I can check it against. My signal generator has no leads, so I built some using shielded audio cable and test lead clips (Radio Shack is still useful for something outside of cell phones!).

One thing I didn't quite understand. You mention the connection between the signal generator and the tube on the tuner (we have the same tuners), but you mention putting cardboard by the tube shield to prevent grounding. I couldn't see how exactly you did this. Can you describe it? Bear in mind I'm a newbie here...

Thanks!