Going through a phase...

 Spectrograph of Krautrock phasing...

Spectrograph of Krautrock phasing...

This week I have been mostly battling with a long running project; reverse engineering a phaser design by a true hero of mine, the late Jurgen Haible. This project involved re-creating the circuit from little more than a few low resolution images and a lot of bashing my head against the wall. Suffice to say this didn't happen overnight. The unit can be seen below, note the 7v light bulbs that are surrounded by light dependant resistors; these give the Krautrock phaser its unique sweeping shape. By looking at the spectrograph above you can deduct the shape visually; a logarithmic curve rather than the sine or triangle wave-shapes one might traditionally encounter.