Vintage ARP Omni 1 Keyboard Synthesizer Serviced with LED Sliders

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via this eBay listing

"This ARP Omni Mk I has just been serviced by Synthchaser - recapped, new LED illuminated 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.
Overall decent condition--the wooden left side panel has a crack and the case has a fair amount of scratches--see photos for cosmetics. The keyboard has been extensively serviced by Synthchaser in March 2026. Work done included:
NOS Pratt Read keybed installed - I installed a new old stock Pratt Read keybed in this ARP Omni!
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.
4075 Filter Enhancement - The ARP Omni uses the same 4075 filter submodule found in the Odyssey, Quadra, Avatar, and Pro DGX. The original filter has been recapped, and enhanced to provide superior frequency response.
Synthchaser Master Oscillator module - the failure prone archaic master oscillator circuitry of the Omni has been removed and replaced with this stable and precise master oscillator which will keep the keyboard in tune.
Oscilloscope calibration - Fully calibrated to factory spec using oscilloscope and frequency counter.
New set of rubber feet
1/4" Output Made High - Normally the 1/4" output is low level and the (unbalanced!) XLR is high. I've made both outputs high."