This is a classic Compact phasing A clone or Krautrock Phaser
There are 2 options for assembled units.
R3 is the Haible version.
R6 and higher is our new modyfied and improved version.
Assembled option is completely assembled and tested unit.
You only need to specify your grid voltage 230 or 115VAC.
Also you need to have a IEC cable for your grid connection.
New R6 and forward Compact Phasing X has additional features.
1)Led indicator for LFO tempo.
2)LFO offset dial.
3)Amplitude potentiometer has Pull function to toggle Auto/manual mode.
We had to remove that in R7 as that potentiometer was too difficult to get.
4)PSU redesign for lower noise.
5)Improved heat management inside the case.
6)Easy to re-calibrate for user taste.
NOTE: the core phasing circuit is still 100% same layout and design as the original Compact Phasing A had.
Case Kit includes:
Screenprinted powderpainted metal case.
Screws and rubber legs.
Red Bypass switch.
4 pcs numbered knobs like shown on the picture.
The case will mount the PCB and the PSU. PCBs are sold under “Haible Krautrock phaser” or “Schulte Compact Clone” name.
Some of the components are specific and should be aquired according to the BOM.
What you will need for the case:
Potentiometers: All Alpha 16mm body solid 6.35mm shaft. 3pcs 50k lin and 1pcs 50k reverse Log or Log
1pcs Toroidal Transformer: 2x15V 0.5A + 0.5A or 2x18V 0,2A + 0,2A secondary ; 62mm diameter; 32mm height. (usually max 15VA transformer will fit)
1pcs Power connector IDC with Switch: Schurter DC11.0001.003 (same dimensions will work from others)
1pcs Fuse Holder: Anything for 13mm panelcutout will work.
6pcs Input output 6.35 stereo normalized jacks: Any plastic isolated connector. Dont use non isolated jacks!
1pcs Double Pole Double throw (DPDT) ON-ON Tumbler switch (Auto/Manual)
1pcs DPDT ON-ON-ON tumbler switch. (2p 4p 6p)
1pcs IEC mains power cable.
Safety notes for diy!
Use only correct Fast fuses.
Ground the case, its made of steel.
Dont use transformer bolt as a ground point, it will create issues as it acts like another transformer winding.
Mains fuse should not be larger than 0.5A.
If you smell anything strange, then there is something wrong. Power off and investigate.
NOTE: make sure you have Rate and Amount jacks correctly wired!
Buld information and J Haible notes on the build:
PCBs are available here: