i have a 1980 lefty 1617 with a suprising crack free top. the pickup was having a few issues with a level volume across the strings. the High E and B strings were noticably quieter than the other strings. i use 12-53 daddario strings.

i reached john budny and bought another saddle pickup and new tone/volume knobs since mine cracked years ago. while i was waiting, i decided to take a look at the preamp.

ok ovation preamp experts...  what is the variable cap/resistor for in the preamp? what will happen if i adjust it? does it set the overall preamp volume? does it change the tone? i cant really adjust it with the strings on since i would have to pull it out and play the guitar while making changes.

on the side of the preamp box it has 701800 written