Putting shields on the tubes helped a whole lot. There is still some interference with the color picture but not the B&W picture. Colors are off in some settings and text is difficult to make out. I used my CTC-7 for a picture comparison (hope you dont mind me riding your coattails with that panther lamp Phil!
). Please ignore the moire effect on the 4 that isnt visible under normal vision nor is it that distorted looking. There is still some beat frequency but that's about it for interference.
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Admiral C322C2 Regent (Restoring)
RCA CTC-7 Pensbury (Restored)
RCA CTC-5 Westcott (Restored)
CRA CTC--4 Director 21 (Restoring)