I recently discovered this old photograph of a prototype 8-stage tube phaser effect ‘pedal’ I built using tag-boards back in the the late 1990s. This beast had quite a few tubes in there, including a magic-eye, 5 x 12AT7s and 3 x 12AX7s, more tubes than a Binson Echorec model T7E! The high-voltage transformer was made by a British company called Danbury Electronics. The solid-state circuitry on the veroboard is the prototype triangle wave L.F.O. that eventually found it’s way into the Phaseomatic PM-1 (only 20 of these were made back in 2002). It would be mission impossible to put together in a production environment – it’s certainly not designed for manufacture by any stretch of the imagination!
You can find out more about ‘The Big Green Phasing Machine’ and the ‘Phaseomatic’ here.