ARP

“This is a refurbished 3604 keyboard with new key bushings and upgraded op-amp. Plays fast with mechanically silent keys. I used two of these keyboards with my Arp 2600 and no longer desire the double set-up. The case is not torn up, but the latches are missing from the top as indicated in pictures. Electronics function 100% and ships with the 6 Pin connecting cable. ”
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“Born in 1973, this ARP 2600 set is 46 years young. It has the coveted Moog type (4012) ladder filter.

Complete professional future proofing performed in the fall of 2019. This 2600 received 68 hours of meticulous care by our technician that has over 30 years or ARP / Oberheim / Moog experience.

We have plenty of references on both sides of the Atlantic with several recent $10.000+ machines sold. Buy with confidence.

Comes with collectable original user manual with the original patch book.

This 1973 ARP 2600 / ARP 3604-P keyboard is now ready for another 40+ years of spectacular sound and music creation.

It is in stunning operational condition and sounds spectacular!

The ARP 2600 is a very early one (1973) that has the Tonus front panel (square holes for the speakers). All the main boards are the Tonus boards, complete with gold plated connectors and the bettering wiring.

This machine has the highly desired copper clad “Moog” filter (4012) and the larger 17″ reverb tank amongst other perks.

These really early 1970s 2600 benefits from a period when ARP/Tonus were still building them with the best components and that extra love.

Really unique to find a beast like this in this fantastic condition!

All submodules are original modules, no re-manufactured clone modules in this machine.

The ARP 2600 is one of the most legendary analog synths every made.

Everything from crazy sound effects, Earthquake style base lines, beautiful leads and potent kick drums, the 2600 can do it all.

Highlights future proofing:

* All new high-end capacitor power supply upgrade

* New powerful mains transformer to ensure (pitch) stability

* Multi turn high end trimmers on power supply

* All circuit board tantalum’s replaced (critical) with high end capacitors

* Full factory specification calibration (or better)

* New main unit Cinch Jones receptacle (for keyboard connector)

* NOS parts refurbished (keyboard) Cinch Jones connector

* New Reverb tank mounting bushings

* All new keyboards bushings

* New keyboards S/H and portamento caps

* Calibrate keyboard tracking”
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“Arp 2600 semi-modular synthesizer with 3620 keyboard
Electronics have been recently maintained and are in full working order
Original Tolex with minor aging/wear, no major rips or tears. ”
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“ARP 2600 v.2 with 3604P keyboard in GOOD condition, plus manuals and extras.
Here is a unique opportunity to own a rare, collectible analog synthesizer classic.
TONUS U.S.A.1971-72 (version 2) with the model 3604-P keyboard and cable – Cinch Jones connectors.

THE ROLAND MPU-101 MIDI – CV converter IS INCLUDED in mint condition with original manual.
** SORRY, LOCAL PICKUP ONLY **

LOCATION DISCLOSURE:
I live on the Cumberland Plateau in middle Tennessee between Nashville and Knoxville.

The included extras:
owner’s manual (quality photocopy and pdf ),
service manual (professionally bound photocopy and pdf)
ARP 2600 Patch Book (quality photocopy and pdf)
ARP 2600 Front Panel Facsimile (blank patch sheets)
custom-made 1/8″ mini phone patch cables (Switchcraft plug)
1/8″ to 1/4″ phone cables
several vintage grey cables with the molded plugs and 1/4″ phone adapters
spare AC line cords

ONE MODIFICATION:
* Switchcraft 1/4” phone jacks added to the front panel.
(one for the pre-amplifier input and two more for the left and right stereo outputs) Very convenient.
*** otherwise, 100% original inside and out ***

KNOWN PROBLEMS:
* No audio from the right speaker and line output.
* The 3604P keyboard contacts will need cleaning.
* One missing slider cap broke off long ago, but the slider pot is still good.
(See the photo of the right speaker volume slider pot)
Please note that this has nothing to do with the first “no audio” problem listed above.

*** other than that, ALL modules and controls function 100% ***
The synthesizer may be used in its current condition.
I am still using it as-is with the Roland MPU-101 MIDI to CV converter.”
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“Behold a vintage synth classic! This is an ARP Sequencer Model 1613, and chances are you already know what it is and what it does or you wouldn’t be looking. The ARP Sequencer was so cool, these days it’s getting cloned!

This is a little like the synth version of the classic car field’s “barn find,” except it was NOT ever stored in a barn or outside or in a shed…no, this all original unit has been stored in a safe hobbyist home studio environment, smoke free, since it was purchased from its first owner in 1981. After that it mostly sat on an Ultimate Support rack and for the last ten years on a shelf.

Model 1613

Serial Number 16130253 (0253)

Included: Original User Manual

US power cord built in

The good news is that this is not a “Lazarus Project.” The unit powers up and clearly it works. Tested with a “drifty” ARP Axxe and Arturia Microbrute. I can “step” through a sequence and hear the connected synth’s sound. However, there are some minor problems – for instance, I believe the slider contacts need cleaning. When stepping through the sequence, you get the same tone no matter where the sliders are located (maybe I’ve forgotten something!). All the LEDs light up and blink perfectly in sequence and random mode, with one exception – I think the Clock LED is out. All the slider caps are present and accounted for. There are NO broken sliders or loose jacks.

Physically, the unit is in outstanding shape for its age. There are a few scratches on the bottom panel, there is a small ding on the lower front (not the operation panel), and there are some weird pry marks underneath (see photos). There is an inch-long scrape on one wooden side panel. It’s missing 3 of the 4 rubber feet. That’s pretty much it on the negatives.

A good cleaning under the hood should revive this cool piece of synthesizer history. I hate parting with it, but I would love to know it’s headed to a loving new home where it can make music once again. I have no doubt that a tech-minded collector, hobbyist, or pro will be thrilled with this piece of ARP synth history. Selling AS IS with no returns.”
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“Rare opportunity

ARP 2600 model 3620 keyboard by itself, with two foot switch pedals (modified aftermarket).

Must See to Appreciate – Pics don’t do it justice
Zero corrosion on nickel surfaces, including fasteners
Flawless lustrous tolex
Mirror polished scratch-free keytops
New zinc plating on key levers – no corrosion
All keys leveled and aligned and even
New Teflon key bushings
New clear silicone key stops
Zero key clicks, ticks, clacks, squeaks, stickiness, or sluggishness
No mushiness. Key depression and release are crisp with just the
right amount of bounce for a synth action keyboard.
Side to side key play is crisp with definitive stops.
Fully reconditioned potentiometers. Sliders and knob glide like butter
Bus bars and wipers fully disassembled and polished
All key timings adjusted and tested
All jack contacts polished and tested
All voltages freshly calibrated

Imperfections that don’t show up in pics: Some micro-pitting on the handle flanges – only visible from two inches away, otherwise looks bright. Two 2 mm touch-ups on upper edge of control panel – not visible unless you know where they are.

One owner from 1983 to present.

These were only ever sold with the synthesizer.
If you have a 2600 with the older 3604P keyboard and wished you had the 3620, or you have a TTSH and want a real ARP 2600 advanced keyboard, now is your chance.”
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“ARP 2600 Vintage Synthesizer and 3604P Keyboard (not pictured)
internal speakrs do not work. The case is scratched up a bit,but the synth is in nice shape.
the keyboard needs new bushings. I can put new bushings in, im ording them. We cn work out youre-buying them at cost, or have me instal them. Putttig in new bushings is easy. . Just take out the keyboard remove whatsleft of the old ones and slip on the new new rubbe bushings. Its the smallest of issues. It works. jut makes clank sound from the keys hitting he post.
i will try to putup a demo on youtube, but it all works.
Probably could use some calibration.”
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“This is the single voice keyboard manufactured originally for v.1 and v.2 series Arp 2600 synthesizers. Unlike old keyboards which are found in attics or forgotten in a basement, this has been an active keyboard in a smoke free studio. The keyboard action has been cleaned and a brand new set of bushings installed last year so it has no clacking or stickie keys. It plays very smooth. All electronic controls function 100%. None of the Tolex covering is ripped, but on the top of the case there are some scratches. It is cosmetically clean but the top of the case is missing the latches and one of the latching hooks as shown in the pictures. I do not wish to do any latch upgrades to the case and would rather that be determined by the new owner. Ships with a 6 pin connecting cable original to the Arp 2600. It will be wrapped and shipped carefully. ”
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“Tonus Model 2002 predecessor to ARP 2500

only around 20 units produced between 1970-1971 before production started on the later ARP 2500 Model 2515.
Recently fully restored by Phil Cirocco at CMS Discrete Synthesizers in the US
Additional calibration and snagging carried out by Keith Kniveton at Lucid Sound in the UK
Cabinet fully restored.

Modules
2 X Model 1004T VCO
1 X Model 1004R VCO (very rare rocker switch module)
1 X Model 1033 Dual Env
1 X Model 1006 Filt/Amp
1 X Model 1027 Sequencer
2 X Model 1026 Preset/Voltage Module (clones, see details below)
1 X Model 1002 Power Control Module (modified for European use)
Keyboard Model 3221

System serial no. 008 built in 1970.

As part of the schedule of works, Phil replaced the power supplies with modern linear models.

All modules were assessed and repairs carried out as needed. Trimmers were added as per ARP specs to aid future calibration.

1002 power module had upgraded front panel on/off switches to work under European 220V power specs.

1026 modules are a short run produced in very low numbers last year, the 1026 was only ever a prototype and never formally released. It syncs to the 1027 sequencer and 2 x 1026’s can be daisy chained which is how its currently configured. They introduce random elements to sequencer steps and are highly complex, interacting with each other.

This has been a no expense spared restoration and has taken around 6 years to complete.

Phil C commented it was the earliest system he’s ever worked on and was ‘historically significant’

Sonically, it sounds incredible and even in its current layout can sound very complex, admittedly its not the most advanced of configurations and there are currently 2 blank module spaces that could add more tone colour if populated with additional modules.

this is a rare opportunity to pick up an icon of electronic music.

I’m now starting work on a second system so letting this one go.”
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