Delta VCF

Multi-mode Filter Korg Delta Poly-61 Clone

This design will be superseded by a revision to the face plate design coming soon in 2018.
It will have the same great sound and be more skiff friendly as well!

The Delta VCF is a faithful clone of the Korg Delta synthesizer filter in Eurorack.
The lowpass circuit was also found in the Poly-61.
And uses the same OTA chips and dual transistor as the original Delta.
It is all analog, no DSP, so it will warm up any signal run through it.

Two select-able filter slopes: original 4-pole, and 2-pole.
Two select-able filter modes: lowpass or bandpass.
Illuminated Frequency and Resonance Bourns Slider pots.
Mix together two different input oscillators at the input jacks w/ signal attenuation/gain pots.
These inputs can overdrive the filter.
Modulate the filter cutoff with two different input control voltages w/ signal attenuation pots.
There are trim pots on PCB for adjusting frequency and resonance range.
Some of you out there may want to give a little boost to the resonance trimpot on the PCB.
Doing so will make this thing scream and howl a little harder.
Each module is painstakingly manufactured and assembled by hand including PCB and face plate.
Available exclusively at Reverb.com http://rvrb.io/delta-vcf-s0y