MATRIXSYNTH: Vintage ARP Omni 1 Keyboard Synthesizer Overhauled with LED Sliders

Saturday, February 22, 2020

Vintage ARP Omni 1 Keyboard Synthesizer Overhauled with LED Sliders

via this auction

"This synthesizer has just been fully serviced by Synthchaser, the west coast's leading ARP specialist - recapped, new key bushings, new LED sliders, new reliable pushbutton switches, clean, fully functional, calibrated, in tune and sounding great. This keyboard is the sound of Joy Division and is all over The Cars' "Moving In Stereo", and many other late 70's/early 80's albums. It produces the lush Solina/String Ensemble sounds plus has a polyphonic synthesizer section with a voltage controlled filter, LFO, and ADSR, and a dedicated bass synthesizer section.

Has a fair amount of scratches on the case, which is common to these synths, see photos. However, the keyboard sounds great and has been completely overhauled inside with hundreds of dollars of new parts and dozens of hours of labor, including:

Synthchaser Precision LED slider upgrade. All 15 of the old original sliders have been replaced with new, smooth, high precision LED illuminated sliders. The difference in the way these sliders feel and perform compared to the originals is a huge improvement.
Synthchaser replacement pushbutton switches - All 10 of the original pushbutton switches (which are notorious for having the mechanical latches break) have been replaced with retrofits. The original switch caps are still installed.
Power supply rebuilt - All tantalum and electrolytic capacitors in the power supply have been replaced, and high quality, high temperature 105 deg C capacitors have been used for the power supply filter capacitors.
All tantalum capacitors replaced - The tantalum capacitors in ARP synths are ticking time bombs. All of the over 100 tantalum capacitors in this synth have been replaced with electrolytics to help provide stable operation for years to come.
Synthchaser 4075 Filter Submodule - The original filter submodule was missing from this keyboard, and has been replaced with the Synthchaser clone, which is the same design as the original, but uses improved quality parts and includes the correction for ARP's original design error that limited the cutoff frequency.
Many IC chips have been replaced - Many IC chips that are common failure points have been replaced
Keyboard rebuild - New key bushings installed, new bus bars installed, key contacts cleaned & adjusted, keys ultrasonically cleaned
Power cord replaced
Oscilloscope calibration - Fully calibrated to factory spec using oscilloscope and frequency counter."

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