Random*Source – Haible Tau Pipe Phaser PCB

£19.90 (Excl. VAT)

This is not a Eurorack project

Read more £19.90 (Excl. VAT)

Out of stock

SKU: Group_PCB_Haible_TAU Categories: , , Brand:



The pcb is available in three different versions

A –  One LM3046 in SMT already reflow soldered in – can be built using 10 THAT300s (Through-hole, sourced by customer) or 20 BCM847DS (SMT, sourced by customer).

B – 1 LM3046 in SMT and 20 BCM847DS transistor arrays in SMT already soldered in

C – Bare PCB – all parts must be source by customer

Make sure you check your version before you start building!
Do not install both BCM847DS AND THAT300s at the same time!


Jürgen Haible’s legendary redesign of the Tau “The Pipe” Flanger – actually, a Phaser, using 20 (twenty!) all pass filter stages is back in a slightly modernized version, including some additions and modifications compared to the original Haible board:

  • Transistor arrays (for the 20 poles): pcb supports super-matched THAT300 (DIP) or BCM847DS (SMT).
  • Obsolete CA3046 in the 1/x function generator has been replaced by LM3046 (SMT).
  • MTA-156 power connector for +/-15V added – don’t install the onboard-PSU parts if you use +/-15V!!!
  • MTA-156 power connector can also be used for 10 pin Euro power connectors – please note that +/-12V is experimental, not supported (yet), see below!
  • LFO: slow mode option has been added.
  • Optional CV mixer/processor has been added (untested!).
  • Connectors have been moved to the edge of the board to allow connecting component pcbs via pin headers – downside: space may be too tight to use normal headers. Workaround: use (breakable) precision sockets for manual wiring or testing.
  • pcb size: 6″ x 3.4″

Make sure you check your version before you start building!
Do not install both BCM847DS and THAT300s!

Please note: There is an error in the optional (added) CV mixer/processor – pins 5 and 6 of op-amp “UM” are mixed up. This can be fixed by leg-bending and adding a wire as shown here. YOU ONLY NEED THIS FIX IF YOU WANT TO USE THE CV MIXER / PROCESSOR – otherwise you can simply ignore it.


– only for the 2015 Haible Tau pcb by R*S –
(not for the original Haible board)

Silkscreen with reference designators and some important info!

Silkscreen with reference designators

Jürgen’s original Tau Pipe flanger page

All information provided is strictly for personal / educational use only.
Please do not distribute / mirror.


A limited number of pcbs is now available for experienced builders. Please not that this is a DIY project involving a fairly complex board designed to be powered by +/-15V  with a number of options, some of which have not been tested yet – Prototypes using THAT300 have been built and are working, however, this does not mean that the previous prototype pcbs (or these pcbs) have been extensively or completely been tested or validated. There may be errors that have not been noted or reported yet. By ordering and building a pcb of the Tau flanger you participate in an effort to bring the original design back in an updated version and gather independent feedback – thank you!

Additional information

Weight 0.05 kg

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