Korg 770 Vintage 37 Key Analog Monophonic Synthesizer SN 770111

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via this auction, also on Reverb

"This was a rescue that needed a lot of work. Synth works and sounds great now. Has cosmetic wear to the faceplate, see photos. No circuit modifications were performed, everything was left as it was.

Work performed:

-Full power supply recap (Nichicon electrolytics)

-All solder joints reflowed on every single board (this actually restored full electronic functionality)

-New Alpha brand 10K power/volume potentiometer switch (Original broken)

-All pots, switches, and faders fully flushed out with contact cleaner and followed up with DeOxit Faderlube as needed

-New knobs (Originals missing)

-New fader caps (Originals missing)

-Keybed removed and fully disassembled and inspected, keys ultrasonically cleaned (needed no repairs or adjustments, was just very dirty)

-New 2-prong power cable properly soldered in (no splices or twist caps)

-New custom-cut unfinished birch ply side panels from Send Cut Send (originals were heavily damaged/broken, hole alignment isn't perfect, still looks good, finish them in the stain/color of your choice)

-New black 3D printed keyboard side trim pieces (designed them myself in CAD, originals were heavily damaged/broken)

-New 3D printed Korg badge on back (Designed myself in CAD, original one was missing)"

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Korg 770 Analog Synthesizer w/ CHD MIDI Kit

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"Awesome synth. Very similar to an ms-20 but unique. The traveler filter is Awesome. Unlike the ms-20 it has pwm. Very Very good at basslines. It is in good shape. None of the pots are scratchy. The only problem is that the highest key is slightly to the side and the spring mechanism isn't bringing the key up by itself. The key triggers the note still, and the note doesn't stay on when you lift the key up, so it doesn't affect playability. Comes with a midi kit I never got around to installing it."

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Korg 770 Analog Synthesizer

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Korg 770 Analog Synthesizer w/ Silver Korg Badge on Back

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Note the silver KORG badge on back compared to previous listings. Curious if it came from the factory that way.

"The best sounding monosynthesizer Korg ever build (imho). Check out the new video from Alex Ball [posted here] for reference. The Korg 770 is looking good and has a mod for CV/Gate and controlling the filter. Very handy."

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Vintage Korg 770 Analog Synthesizer with Original FK-4 Foot Pedal

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"This vintage Korg is in very good cosmetic condition, and excellent operational condition. All keys, sliders and pots work perfectly as intended, with no static or noise present. This 770 comes with an original FK-4 Polyphonic Ensemble Pedal and Cable. This enables you to control the amazing filter/traveller via the FK-4. Also included is a copy of the original owners manual in both English and Japanese."

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Korg 770 Vintage Analog Synthesizer

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Korg 770 Analog Synthesizer SN 760071

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KORG 770 Analog Synthesizer Keyboard w/ Traveler Filter & Dustcover SN 770927

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"This unit is 100% perfect working. All fully functional.
Cosmetically in EXCELLENT condition.
The VIBRATO and TRIGGER REMOTE SHAFT is not original.
The VOLUME KNOB is not original."

Update: you can find demos of one posted here and here.

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Korg 770 Vintage Analog Monophonic Synthesizer SN 770842

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Korg 770 Vintage Analog Monophonic Synthesizer SN 770852

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Korg 770 SN 770038

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"An ultra rare mono synth from 1976! This often overlooked synth sounds great. It is capable of some really awesome early analogue sounds.

Only 100 units made, imagine how much left! It can make some weird noises largely due to it's retro-cool ring modulator.

You can also run external sounds through it.

It has two VCOs, two kinds of Ring Modulation, three kinds of Noise and the High Pass and Low Pass filter a featured on dual traveller sliders!

Oscillator Subtractive synthesis analog mono synthesizer with 2 VCO and portamento mode:

- VCO1: octave range from 64' to 2', tuning +/- 5 semitones, shapes triangle, square, saw, pulse, pulse with variable width. Also special external mode (see filter)

- VCO2: octave range from 16' to 1, tuning +/- 5 semitones, shapes saw, Ring modulator 1/2, Scale Noise, Pink Noise and White Noise.

FILTER The filter is analog (Traveler) allows flexible and sofisticated LPF, BPF and HPF with 'BRIGHT' which is the resonance.

ENVELOPE single EG generator "AR" Attack/Singing Level, the Range is based on 3 level presets

LFO Single delayed triangle modulator with variable depth and reaches a pretty high frequency for some FM modulation on pitch.

Also can acts as a simple VCA vibrato. It's got a fast envelope, auto bend, and LFO re-trigger too."

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Korg 770 analog synthesizer SN 770877

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"Original vintage c 1970’s Korg 770 analog synth in excellent working condition, freshly serviced and calibrated, ready for another 50 years of weird. The 770 is the precursor to the more common ms-20/ ms-10 synths, and shares many features and sonic characteristics with these later models, though much rarer, and much cooler. This is a legit Japanese non-export model, 100v. Enjoy!!!"

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Korg 770 Analog Synthesizer

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The 770 is a very early, very cool Korg synth, but you probably know that or you wouldn't be looking. White noise, tuned noise, 2 different ring modulator modes, 2 oscillators, High and Low Pass filters. It has a mean, raw sound that later pieces like MS20 can only dream of!

The great thing about these is they sound like nothing else. If you're an analog synth guy who already has the normal stuff, this definitely opens up another range of sounds you can create. In fact you can go inside the unit and tweak trim pots to alter the behavior of the filters! You can also run external audio through them.

The only issue with this is the auto bending feature doesn't work consistently, but it isn't broken. Oh, and apparently it was used near some spray paint as there is a bit detectable on the right end cheek and a very subtle amount on the far right side of the control panel, but unless you're staring at it under bright light you won't even notice."

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Korg 770 Analog Synthesizer

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Korg 770 Vintage Analog Monophonic Synthesizer SN 770204

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"This 770 is in perfect working condition and in very good condition!!

This unit was checked/ cleaned by professional technician."

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Korg 770 Analog Synthesizer

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"Excellent classic mono-monster. No issues on this one at all. Prime condition!"

KORG 770 Vintage Analog Synthesizer SN 770059

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"Repair & adjusted point

・out jack (tighten the nut / cleaning contact point in out jack)

・keyboards (adjusted C3. exchanged A#3. all key’s contact point were cleaned. )

・all pods, sliders, switches (all contact points were cleaned.)

・oscillator (tuning done)

・all function (testing done)"

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Korg 770 Vintage Analog Monophonic Synthesizer SN 770722 w/ Extras

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Korg 770 Vintage Analog Synthesizer with CV GATE SN 770167

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Korg 770 Analog Synthesizer

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