Yusynth Minimoog Filter

Yusynth Minimoog Filter in MOTM with 15V/-15V, works great, sounds great

(its not the same sound like a MOTM 490. the resonance range is better and not so much resonance oscillation here, the resonance is natural/softer)

the motm490 have more power, more punch, but dont have a mixer..

both are good filters.

As a minimoog owner i can say, the yusynth minimoog filter sounds very good in combination with MOTM300 and a Macbeth MK1 VCO.

BOM:

Frontpanel connection

picture from http://yusynth.net/Modular/EN/MOOGVCF/index.html

Open

Trimming

copy from yusynth

V/Octave tracking :

• Apply 0.000V to the V/Oct input

• Turn the frequency knob fully counter-clockwise in order to measure 0mV at the base of Q1 (node between R9 to R11)

• Apply 1.000V to the V/Oct input

• Adjust T1 in order to measure 18.2mV at the base of Q1

• Apply 5.000V to the V/Oct input

• Check that you have 91.0mVat the base of Q1, if not adjust T1

• Apply 0.000V to the V/Oct input

• Set the filter to auto-oscillation (EMPHASIS turned fully clockwise)

• Connect a keyboard (CV/GATE) to the V/Oct input

• Play a tune and check the goodness of the tracking

• Slightly adjust T1 to achieve a good chromatic tracking.

Frequency range :

• Apply a sinewave with frequency 32Hz to the audio input

• Emphasis potentiometer to minimum resonance (fully counter-clockwise)

• Turn the frequency knob fully counter-clockwise

• Adjust T2, in order to mute the 32Hz signal.

Emphasis :
Adjust T3 in order to reach auto-oscillation near 95% of the full range of the EMPHASIS pot.