Mu-tron III

Got on old Mu-tron III in for repair.  It appears not to be tinkered with before. As I got it up I realized there’s some difference as compared to the schematics circulating the web.  I found two caps that differs from the schematics. The 4,7uF capacitor in the drive section for the led is actually a 3,3uF in this unit.

The 15uF nonpolar cap at the output is 10uF.

Looking at the schematic you can see them where I made notes about values in red text.

Here’s a pic of the old lady

Turned out the rocker switches for range and drive did not work as they should. Some cleaning sorted that out.

/Krister

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