[R-390] Antenna Trimmer

[Steve Hobensack]

Adding to my original post, there are no red marks or dimples. The only mark on the horizontal gear is the small drive pin that holds the gear to the shaft. I believe the mid point between the two peaks is the place where the variable cap is either at full mesh or no mesh. It's difficult to  guess if it is full mesh or no mesh without opening the unit. That doesn't look easy. Two peaks can happen at any angle up to 180 degrees. If there is only one peak through the full 360 degree turn, it usually means there is not enough capacatance and the front end needs re-aligned. If half mesh is on the zero numerial, the second peak will be out of the numbered area. Right?
 
Looking at the tiny drive pin that goes through the horizontal gear, where is the red dot, and where does it face during alignment?
 
Thanks
N8YE Steve