Hi,
No, once I confirmed by the ringing test it was bad, my guess would be the HV winding.
I tried to take it apart to see if a (partial) rewind would be possible, but it was impregnated solid, so a rewind was a no-go.
The new one performed perfectly, so I added the fan ( as in many 22xx scopes) and performed a full calibration.
Leo
satbeginner