[radio1]

I see that one of the cap sections has a possible metallic washer installed over the shorter (cut off ends) bronze metal plate.  Don't know if the insulated washed is under that. A 70 I purchased had that type of shorter plate on the oscillator section and was loaded with several metallic washers that was probably an attempt to add capacitance to get it to align. If this is metal on yours, and if it touches the metal upward tabs on the metal plate, all kinds of pops and static can occur, especially when the metal washer gets gunked up.  You can experiment with that area, cleaning the metal washer, trying with and without it. During my experiments, I saw how much difference this one small area can make in gain and alignment.