Control Panel remounting... LED's replaced with modern low profile diffused brightness LED's. Old style LED's tend to crack the plastic panel cover as they touch the surface. An original LED is held up for comparison. Power Supply (PSU) board. All four capacitors replaced. Modern types are smaller (as can be seen). This unit has a Moog PSU rather than the previous Faratron that caused overheating!

Mods (Factory Modifications)

Throughout the Polymoog's production run, Moog issued Service Departments with various Mods to correct various technical issues.

During this restoration Colin carried out all the Mods that were outstanding.

Keyboard restored and rebushed (believe me, it plays like a dream and the keys are perfectly level). Each key is filled with an epoxy resin and lead shot mix and have a lovely weighted feel with very fast response and recovery. Most Techs avoid working on the keys as they are very labour intensive. If you can though, have it done. The Polymoog keys once restored are wonderful. A factory mod was required on the TL Board. This involved cutting the track and bridging it with 2 resistors to prevent jitter in the phase lock loop.
Another mod to the TL board, once again the track was cut and bridged with 2 resistors to correct temperature stabilisation of pitch. This Polymoog strangely, had a Rev 1 AND a Rev 2 HFO board. This required modding the Rev 1 board to Rev 2 as well so that they matched. The first image shows the underside of the Rev 1 board modded and the second picture shows the Rev 2 as is. The modded Rev 1 HFO board (top view).
The top of the Rev 2 HFO board as is. A mod to the TL board to prevent pitch controller leakage. The next two images show the final re-assembly of the Polymoog after all the restorations were completed. NEXT... The Finished Article