I just bought a 1974 Minimoog and am trying to fix the Oscillator tuning. The only problem is that the service manual I have and everything I find online about it either refer to a board with 2 rows of 3 trim pots, or 4 rows of 3 trim pots. Mine has 3 rows of 3 ?
I’m pretty much lost. I can tune the keyboard in one range by blindly turning random trimpots, but then if I switch to a different range, the tuning is completely different.
Does anybody know how to deal with the 3 rows of 3 pots and how I can tune the whole range of the instrument ?
(earlier boards): tune top notes using range trims; tune lowest notes using scale trims.
Tune octaves using single trimmer located at bottom of board.
(later boards): tune bottom notes using range trims; tune highest notes using scale trims.
Tune octaves using separate (per osc) trimmers located in rows for each osc.
Thanks for the reply. After some research I found I have the new OSC board. You can see a photo of the old and new style at the bottom of this page : http://minimoog2.monsite-orange.fr/page6/index.html I have the new one, the one with 3 rows of 3 pots.
The back of my mini only has holes for the old style so I don’t know which button is which function (octave,range etc)
The tuning procedure in the manual is wrong. You should start out with the octave switches all the way up to 2’, perform scale/range trim for each oscillator, THEN change octave switch and adjust octave trim. The reason for this is that this 2’ octave setting nulls out the octave trimpot while you scale and range the oscillator trimpots.
If you follow the incorrect procedure in the manual of octave trim then scale/range trim, you get the result you are finding.
Yes thanks, I did send a photo of that board too but Im still being moderated with nothing getting through.
The problem I have is that I do not know which trimpot is the Octave, or the Range or any of the other options because they’re not listed, and my moog has the old back with holes for the old board.
If I can find out which is which, I can start trying to tune it
Here is a pic of a Minimoog later osc rear overlay.
These were supplied with the new osc board upgrade kit and meant to go on older rear panels.
I have several hundred originals in stock.
“Shift” is the same as “range” (base osc tuning)
