Here are some pictures showing how to
modify the M-110 for Linear FM.
It uses the 2nd mod socket on the VCO as
a Linear FM input.
Cut the track on the control panel pcb, shown
Then solder a 47k resistor, onto the indicated pad.
Solder a 100n capacitor in series with the resistor.
Solder a wire from the capacitor to IC3 Pin2, as
shown in pic2.
The 47k resistor gives a nice depth range for FM,
With this value you can set the mod depth to about "8" for
stable FM from direct output of another osc.
Higher mod depth gives more unstable fun !!
- View of Main PCB
- 110_LIN_FM_Mod_2.jpg (322.27 KiB) Viewed 14432 times
- View of Panel PCB
- 110_LIN_FM_Mod_1.jpg (329.62 KiB) Viewed 14432 times