oberkonn vcf001

YouTube via bluelantern320. via this auction
"The signal is dry and demonstrates the Cutoff sweeps of the LPF/BPF/HPF.
An external Saw wave was used."

oberkonn vcf002

"This is a mixdown of the Pure Sine wave from the filter, an external Saw/Ramp wave, and an exernal midi to cv converter."

via this auction

"Up for sale is an industrial VCF I call an OBERKONN. This is a very distinct vcf in which I focused on Sine Oscillation as it's main character. There is a switch to kick the vcf into hard big self oscillation.
Every input on the VCF has a big range. In otherwords you don't simply turn the knobs all the way up otherwise you will have crazy big big sound! You can either dial in clean or head into hard fat saturation.
In normal mode the Filter will begin Self oscillation at Mid level Knob location. As you go up the Sine Wave pushes harder and harder. If you like that smashed Sine wave sound you then can flip the switch to go even further.

The panel is made of 0.125" 6061 Aluminum. The panel is in frac rack standard measurements. The knobs are soft touch grey and yellow in color.
The jacks are switchcraft high quality 3.5mm jacks.
The unit is kinda heavy because of the wood.

I WIRED THE CV KNOB REVERSE, I ALREADY SHRINK TUBED IT SO I LEFT IT ALONE, THAT IS THE ONLY FLAW. SO IN OTHER WORDS THE CV KNOB FOR THE FILTER IS REVERSED (COUNTER CLOCKWISE). NO BIG DEAL.

THE FILTER IS NOT SEM OR CEM BASED. IT IS BASED ON DISCREET PARTS AND THE GOOD OLD LM13700. I LIKE THIS BETTER!

It has (2) Red VCA's that I was selling as a PCB also. The internal power supply is 15v based.
The power adapter is included in this auction. The box is made of pine wood and is very well constructed.

The filter is a 12db Variable state filter that offers LP, BP, HP outputs.
These are the features of the FILTER side:
-offers LP/BP/HP outputs
-has a bi-polar FM input
-has a normal cv attenuator
-has Linear FM input
-has (2) audio inputs, there are (2) pre-amp trimmers inside the unit (i have them set to half).
-has a Rez CV input with attenuator

EACH VCA offers:
-has a main volume out knob
-has an attenuated CV input
-has a direct CV input
-has an initializer knob like Arp VCA's"