HAIBLE KRAUTROCK PHASER / SCHULTE COMPACT CLONE from RANDOM*SOURCE
Jürgen Haible was one of the most creative and prolific minds in music electronics. His tragic and unexpected death in 2011 led to a complicated legal situation in which his amazing designs fell into a kind of abeyance. To preserve his extraordinary work Random*Source managed to acquire the electronic heritage of Jürgen Haible – designs, IP etc. – to make his designs available again. The famous Krautrock phaser is the first design to reappear in 2015.
RANDOM*SOURCE Haible PCBs are the only official source of Haible products. The proceeds of the Random*Source acquisition went entirely to the estate, i.e. to Haibles children.
The background of the “Krautrock Phaser” in Jürgen’s own words: If you listen to German records from the 1970’s, you often hear a rather unique phasing that comes from a device called “Compact A Phaser” from the Berlin company “Gert Schulte Audio Elektronik”. It’s often referred to as “Schulte Phaser”, and I have heard it being called “Krautrock Phaser”, “Schulze Phaser” (because it’s prominent on many early KS albums), “TD Phaser” (because of Tangerine Dream). In my opinion, this phaser has been important to the sound of these early electronic musicians almost as much as the synthesizers the used.
The Krautrock Phaser 2015 pcb is a faithful reproduction of the original board by Jürgen Haible that has not been available for years.
Original documentation including BOM: Jürgen’s Krautrock page
– please read the section on Safety and Thermal Issues –
Some details of the Random*Source Krautrock PCB:
- Layout widely identical to the original pcb, except
- (1) Jumper to select feedback stage (2, 4 or 6)
- (2) Optional connector for Resonance pot (in addition to Res trimpot)
- (3) Support for 9mm vertical pcb-mount Alpha pots (alt. to Alps)
- Power supply: 18V external or +/-15V (MOTM standard)
- Pcb size: 150mm x 100mm
- ROHS / lead free / gold finish (ENIG)
- Pcb made in EU
The Krautrock PCB is not particularly difficult to build, but due to the size only recommended for experienced builders. Also, due to the lamps used, please be aware of power consumption and heat. Please refer to the original documentation and BOM linked above.
Additional build info for the 2015 edition of the pcb: