Civilian Wartime Radio - Further Notes

[Sparks]

I connected the oscilloscope to the grid, but there was nothing that I could make any sense of. Either the oscilloscope is not good enough, or, more likely, I am not good enough to figure it out! Whatever radio I have ever built over the past 20 years has had this distortion problem with this particular station, so I can reasonably assume that is the problem.
Bob