J Haible

Very unique Flanger type effect designed by Jurgen Haible. It can be subtle and it can be a total sound destroyer.
Designed on top of BBD chips inspired by many different vintage Flanger circuits. It is pretty complex unit with lots of functions but its very intuitive and easy to use.

Main features worth mentioning.

Stereo IN and Stereo OUT.
Dry Wet Mix.

Envelope follower with release control.
Internal LFO with Sample&Hold, Slew, Ramp curves.

Manual Sweep and Fine tune
Special Bounce control that will turn the Sweep to center.

External CV for: modulation control, rate control, 1V/Oct input to modulate the Sweep.

Lots and lots of toggle switches

Our goal was to bring Jurgens vision back alive for everybody to enjoy his talent and good work.
Front panel design is kept very similar. The only addition is the Power On/Off switch.

Additonal parts that you need to get on top of the PCB assembly is listed in this BOM. Use the BOM to get refferences or order directly from the Sources listed.

SOST_BOM

Jurgen Haible took the Schulze Krautrock phaser design from 70s and gave it a new life with some modifications.
The original unit was produced by Gert Sculte Audio Electronik and was widely used by Kraftwerk

After many revisions Random Source ended up with a new PCB based on Jurgens design with some modifications.
It does look like the original Compact Phasing A from outside but inside has many improvements and extensions. Although they sound the same and work on the same principle.

The design is based on optocouplers. Total of two incandescent light bulbs and 8 photo resistors working the phasing magic.

Front panel controls are the same except you have a true bypass switch with light.
Backpanel has been built to 6,3mm TRS jacks for modern world interfaces.

You can have expression pedals connected to manipulate the parameters: Rate, Amount,
Momentary swtich for External bypass extending the bypass switch on the front.

We have added access to additional parameters with toggle switches: Auto/Manual LFO, 2pole/ 4pole/ 6pole Phasing.

Input is MONO and it sends out Pseudo-Stereo or just Mono.

Internally there are 3 parameters to control: Resonance, LFO low limit and LFO Range.

The unit is using its internal linear PSU with toroidal transformer. There is IDC connector on the back and mains fuse.
PCB is mounted on metal standoffs. Potentiometers are wired to the board and so are all the signal connectors.