Radio & Tape noise in 91 Vanagon

I have an abnormal sounding static problem that appears when the radio is on (AM or FM) and when the tape player is playing a tape.

The noise isn't affected by rpm's BUT it gets temporarily worse or better if I tap on the radio face. The static also isn't a constant sound as most static is but clicks in and out and affects the audio from the radio or tape with a strange phase shifting type effect.

I do have a snapped antenna-but, that shouldn't mess with the tape playing, right?

I pulled the dash apart and things seem to be connected properly there.

I read here that someone had noise problems from a bad wire between the distributor and plugs. I just had mine replaced a week or so before the problem:

Thanks in advance, Rob