Instruction Manual

This varies the amount of control voltage passed from the Emp. CV Input (14) to the lter

core and it’s range is 0% to 100%. The manual Emphasis Level control (13) is still active

when using external CV control of Emphasis and acts as an oset control.

This is the audio output for the signal after passing through the lter core and would

typically be connected to the Audio Input of a VCA. The output level is dependent upon

the input level, with a single input of +/- 5V to (for example) Audio Input 1 and Audio 2

Level at 100% the gain would be unity, i.e. output would also be +/- 5V.

Power Cable

A Scale Adjust :

Sets the 1V/Oct voltage scaling. To adjust, rst remove all inputs, then turn Emphasis

Level (13) to 10 (full on) and adjust Frequency Control (7) for 440hz output. Now apply

EXACTLY 2V to the 1 V/Oct input and adjust for 1760Hz output (precisely 2 octaves

higher).

B Regen Adjust :

With no inputs, set Emphasis Level (13) to 10 (full on) and adjust Frequency Control (7) for

440Hz. Now turn Empahsis Level to 8 and turn Scale Adjust Trimmer until the lter just

starts to selfsoscillate.

C Oset Adjust :

Adjusts the vactrol circuit oset. FOR MANUFACTURER ADJUSTMENT ONLY, specialist

test equipment is needed to calibrate this trimmer correctly.

D Range Adjust :

Sets the frequency range. To adjust remove all Inputs, set Emphasis Level (13) to 10 (full

on) and set Cuto Frequency (7) to -1 position. Adjust trimmer for 440Hz output.

E Gain Jumper :

See previous page.

Note:

This information is given for completeness, the MiniMod VCF is calibrated after manufacture

and under normal circumstances should not require any user adjustment.

Adjustment and Calibration

A Scale Adjust

Red Stripe aligns with -12V as shown

B Regen Adjust

C Oset Adjust

D Range Adjust

E Gain Jumper

If you need any help using this module or have any technical questions please feel free to