Sequential Circuits Prophet 5 Rev 2 w/ Kenton MIDI

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"The rev 2 used the earlier SSM chips that sound to my ears so much better than the later Curtis chips. The problem with the SSM chips (and probably why they went to the Curtis chips) and more generally the rev 2 was the tuning stability. This is why bands quite often used the rev 2 in the studio but the rev 3 on tour (Talking Heads, Japan etc). This problem has been resolved in the rev2 thanks to the masterly work of James at Synth Repair Services...there are now 8 little pixies running around inside making sure the tuning is just tickety-boo (well thats what James told me)

for the more technically minded, the power supply was upgraded (see toroidal photo), all presets replaced, and very high precision resistors used in DAC circuit. There is probably more to this mod but thats all I could work out from James Walker(Synth Repair Services).

I have been told that this was one of the earlier Prophet 5 rev 2's as it has a smooth panel surface, I have not been able to verify this. If anyone out there is more knowledgeable on the different rev2's it would be great if they could let me know if this is true or not."

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Moog Prodigy analogue synth fitted with CV, Gate & Filter SN 2537X

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"When I bought this a few years ago it had just been serviced by James Walker of Synth Repair Services.

It had also been fitted with a Kenton socket kit on the rear, providing CV, Gate and Filter mono mini-jack inputs - you can run a sequencer through it amongst other things. Normally I wouldn't approve of tinkering with classic models but in this case it really does add 'functionality' + the upgrade is discreet, professionally done and doesn't destroy the appearance..."

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SCI Prophet 5 Rev 2 polyphonic analogue synthesizer

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"The rev 2 used the earlier SSM chips that sound to my ears so much better than the later Curtis chips. The problem with the SSM chips (and probably why they went to the Curtis chips) and more generally the rev 2 was the tuning stability. This is why bands quite often used the rev 2 in the studio but the rev 3 on tour (Talking Heads, Japan etc). This problem has been resolved in the rev2 thanks to the masterly work of James at Synth Repair Services...there are now 8 little pixies running around inside making sure the tuning is just tickety-boo (well thats what James told me)

for the more technically minded, the power supply was upgraded (see toroidal photo), all presets replaced, and very high precision resistors used in DAC circuit. There is probably more to this mod but thats all I could work out from James Walker(Synth Repair Services).

I have been told that this was one of the earlier Prophet 5 rev 2's as it has a smooth panel surface, I have not been able to verify this. If anyone out there is more knowledgeable on the different rev2's it would be great if they could let me know if this is true or not."

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KORG Mini 700S SN 503294

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"This is most likely the cleanest example of a Korg Mini 700s you will see for sale any time soon.

It plays impeccably with no sticky knobs, sliders or keys. A few scuffs on the wooden end cheeks but that's expected for a synth almost 40 years old!

It was serviced by James Walker (last year) from Synth Repair Services - who repairs synths for the stars! I have the receipt to show this also."

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PEARL SYNCUSSION SY-1 With Drum Pads, Stands, Case & Original Box

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“A superb example of our favourite drum synth: for sale serviced and in perfect working order. Comes with the original carry case, drums for triggering it still in their original box, power supply and some of the original paperwork. The condition is excellent / near mint: there's barely a mark on it with only one ding to the casing visible from the front – please see the detailed photos in the listing to assess it for yourself: it doesn't look to have ever been near a drummer. The plastic case is in fair condition with various tears along the edges but still functional. The drums have seen some use but both skins are intact. Serviced by James Walker at Synth Repair Services, and also modified for separated outputs on a TRS jack.”

Welson KO ( keyboard orchestra ) string synthesizer

Published on Jul 16, 2016 osbornesmith1

Volume gets louder at 1 minute mark.

"Welson KO ( keyboard orchestra )
This was recorded with no added effects.
It has two outputs, one for strings and one for piano & harpsichord.
Very rare Italian string synthesizer from the mid 1970's with a
beautiful analogue tone.
Made by Webo Electronics Co."

Update:

via this auction

"Checked over by James Walker of Synth Repair Services, Stoke on Trent.

It has two outputs. One for strings - violin and cello and one for percussion - piano and harpsichord.
This is really useful for splitting the sounds and running through a delay for example.
It has a beautiful mellow analogue sound and not as harsh as some Italian string machines of the era.
All sounds are fully polyphonic and can be played simultaneously.
It comes with custom made wooden shipping case."

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Kawai / Teisco S-100P Vintage Monophonic Synth with Aftertouch SN K-3715

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"Highly sought-after and rare analogue performance synth with great sounding built-in flanger and spring reverb. The real strength of this synth is how expressive you can be due to the assignable aftertouch.

The S100P is often likened to the Arp Pro Soloist made famous by Tony Banks of Genesis fame, in fact the S100P aftertouch system was manufactured under license from ARP. The aftertouch can be routed to several destinations simultaneously, including pitch bend up/down, filter, vibrato amount and "growl" and the sensitivity is adjustable to suit your playing style.

This example is in perfect working order and it has just been professionally serviced by James Walker of Synth Repair Services so you can be confident that everything works perfectly. As part of the service James has fitted a brand new all-important aftertouch sensor as these tend to harden with age. The new one means you wont have to press hard to activate it.

Cosmetically the synth is in very nice condition for its age with just a few light scratches and some peeling of the veneer on the wooden end panels..."

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Sequential Circuits Studio 440 SN 00445 with Sound Disk Set, Brochure & Manual

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"Sequential Circuits Studio 440

Drum machine, sampler, sequencer, vintage, analogue filter

This unit has had a very recent service by a professional technician (James Walker of Synth Repair Services).

Totally overhauled. New back-light.

It has been upgraded to the last software release by SCI, for SCSI implementation and OS.

The pads have been replaced with new ones (from Wine Country in the USA).

The data slider has been replaced with a new one (from Wine Country in the USA).

The unit is in full working order. Cosmetically there are a few small marks, but nothing serious. Please see pics!

The Studio 440 is genuinely RARE - this one is number #445 of #500 ever made.

In this sale I am including the following:

Studio 440 unit.

A lot of 3.5” disks containing samples/sounds for the Studio 400 – see pics! One of the boxes is still sealed!!!

Original owners manual plus brochure.

Some background information:

The Studio 440 is like the Grand-Daddy of Sequencing/Sampling Drum and Music Production Machines.

Similar to the MPC60, the Studio 440 has an analogue low-pass filter. The Sequencer is intuitive and quite functional with a capacity of 50,000 notes, 8 separate tracks and a swing function. But unlike its contemporaries, the 440 has some visionary features for its time. MIDI data from the sequencer can be transmitted out so that it can play external MIDI instruments. There is also built-in SCSI for external drives and storage."

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ARP Odyssey 2800 MK1

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"Up for sale is a mid-1970s vintage ARP Odyssey MK1 analogue synthesizer. This is the rarer black/gold MK1 model with the desirable ARP 4023 filter.

The Odyssey is in beautiful condition for its age and is fully working. Two weeks ago it was serviced by James Walker at Synth Repair Services in Stoke on Trent.

The keyboard feels great and all sliders are smooth and fully intact. The synth has a 230V UK power supply and cable and has also been fitted (by James Walker) with the ARP Odyssey Kenton socket upgrade, which gives additional CV, Gate, Trig and Filter CV inputs on the rear of the synth, making it much more versatile."

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1971 MUSONICS MINIMOOG MODEL D SN 1204

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"Soundgas are pleased to offer for sale this stunning early Minimoog Model D in excellent cosmetic condition and perfect working order.

It's in a finely-crafted Claro Walnut case, (the original case was beyond repair) and has been extensively overhauled by a respected synth tech in the USA. It's just been checked over and tuned/calibrated by James Walker at Synth Repair Services.


It was completed in August 1971 by 'Kip' at the R.A. Moog Inc. plant at Trumansburg, NY.
It's a 110v USA model.
All hardware looks to be original (aside from the case). The attack and decay controls were incorrectly-wired from the factory - the attack knob controls decay and decay knob controls attack: it has been left in this original state (a simple fix to put right, but we felt it to be part of the synth's history/identity - as did the US synth tech who worked on it previously).
Extensive work had been completed on this synth before we bought it to ensure reliability and practicality - this is an early Moog you can play: the tuning and tracking are very impressive for a Mini of this age with its original oscillator board.
All boards have had new metal film capacitors and new electrolytic capacitors.
The trimmers have been changed on the VCA, VCO and power supply boards improved fine tuning.
The filter board has rematched transistors and sounds stunning.
An octave buffer board has been added to the octave selector which, together with the additional wiring on the switches makes for greater stability.
Did we mention that the filter sounds gorgeous?

This Mini sounds and plays every bit as good as it looks: a practical classic and solid investment. The filter is slightly smoother and creamier than later Minis - this Moog has that classic rich larger than life sound."

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OCTAVE CAT SRM Vintage Analogue Duophonic Synth

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"It's just been serviced and calibrated by James Walker at Synth Repair Services, including a full overhaul of the keyboard bushings, new jack sockets, recapped power supply and new slider caps. This synth is in excellent cosmetic condition for its age and sounds great. Inevitably for an instrument that's 30-plus years old, there's a few scuffs and scratches (see many detailed photos below), but overall it's in excellent condition. It runs at 240v.

These classic US synths are vastly underrated and represent excellent value for money compared to their more famous rivals, the Minimoog and Arp Oddyssey. They are hard to find, and highly-rated by synth cognoscenti. The flexible nature of this synth means it really punches above its weight: particularly notable features are the cross modulation options and mixable waveforms. It dates from the mid to late 70s and sounds like a classic 70s American monosynth should: powerful and tonally brilliant. Sound design-wise it's almost limitless with an abundance of bass, leads, and sound effects on tap - it's easy (and very rewarding) to lose yourself for hours programming this beast..."

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ARP 2600 Vintage Synthesiser

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"Formerly owned by the great Kenny Everett!
Immacutale condition.
240 Power Supply
Everytghing in perfect order
Complete restoration 2 Years ago by James Walker of Synth Repair Services UK
Re Tolexed
All 1/8'' sockets replaced, all sliders re conditioned.
Comes with Keyboard and some patch cables, mains lead and keyboard link cable.
Will post anywhere, quote will be made when buyer is confirmed."

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1973 MOOG MUSIC MINIMOOG MODEL D with Original Suitcase

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"It has just been serviced, calibrated and PAT-tested by James Walker at Synth Repair Services. The keyboard contacts, pots and switches have been cleaned and the power supply recapped. It has been converted from 110v to 240v operation (this is easily reversible).

Dating from late 1973, this instrument is in excellent original condition - it has the early oscillator and filter boards (many of the pcbs are RA Moog boards). It comes in the original suitcase (which is missing its original foam - presumably long since deteriorated) and has a full complement of original literature: owner's manual, Tom Rhea Sound Charts booklet and unused user patch charts tear-off pad - all in excellent condition."

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PPG Waveterm A for Sale

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Designed to work with the PPG wave 2.2
Fully refurbished by James Walker of synth repair services, unit is sold as fully working.
Sale includes cable and os disks, this is a PPG waveterm A but it has the 5 1/4" disks that the waveterm B uses..."

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ROLAND JUNO 106 Synth nrMint Serviced w/Spare Chips SN 487441

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"The 106 is a classic Roland poly synth and was used extensively on Daft Punk's Random Access Memories album.

This is a chance to buy as good an example of this synth as you're likely to find. It has just been thoroughly-overhauled by James Walker at Synth Repair Services: several new VCF/VCA Voice chips have been installed as required and it ships with an extra pair of original Roland chips for possible future repairs.

It's in exceptional condition for a synth that's approaching its 30th birthday with only very minor blemishes to the paintwork and a few minor scuffs to the end cheeks.

There are no known operational faults with this unit..."

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1973 MOOG MUSIC MINIMOOG MODEL D SN 2912

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via this auction - pics of the inside below. Little beer cans in there.

"It has just been serviced, calibrated and PAT-tested by James Walker at Synth Repair Services.
The keyboard contacts, pots and switches have been cleaned and the power supply recapped.

Dating from 1973, this instrument is in excellent original condition - it has the early oscillator and filter boards and sounds/plays every bit as good as it looks. Please see pictures below (more to follow).

The wooden case has been lovingly-restored and lightly polished with wax - it has not been stripped, sanded or revarnished as this would spoil the vintage patina, so there are marks, scuffs and dings as you'd expect from a 40 year-old instrument. The face and knobs are original.

There are no known operational faults with this unit..."

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Korg Trident Mk1 vintage analogue polysynth

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"This Trident is the Mk1, the rarer and better sounding of the Tridents. Its in reasonable condition and is currently being re-built, serviced and calibrated by James Walker at synth repair services so it will look even better than the pictures.."

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Arp Odyssey

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"In excellent condition and full working order.

Serviced by James Walker of 'Synth Repair Services' in Stoke on Trent on 10/6/2012

Close to mint condition and sounds amazing."

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ROLAND SH-2000

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"It has been serviced and PAT-tested by James Walker at Synth Repair Services and is in perfect working order
It's in great condition for a synth that's approaching its 40th birthday with minor blemishes and crazing to the paintwork and vinyl finish and a few chips and scuffs to the 'wooden' end cheeks.
There are no major marks/scratches on the keys, all the selector switches are clean and undamaged, the end cheeks bear some chipping/scuffing on their edges, all switches and sliders move freely and noiselessly. Apart from the end cheeks and a few minor scratches, it's in very good condition: it just demands to be used to make funk, disco, prog rock, or whatever cosmic delights you should desire.

This was Roland's second synth (introduced in 1973 following the SH1000) and was the first to feature aftertouch, which makes it a very expressive instrument indeed. From fat and funky wobbly basslines to squelchy soaring leads, this synth delivers (as well as a multitude of 'authentic' recreations of acoustic instruments) - a personal favourite preset is the 'popcorn' (from the disco classic of the same name?)..."

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Fully Serviced Rhodes Chroma with CC+ MIDI

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"Offered for sale is this Rhodes Chroma in excellent cosmetic condition and as near perfect working order as could be hoped for. It has had an extensive service and been thoroughly-upgraded for trouble-free use (*remember it is a Chroma!) with no expense spared. The work was carried out by James Walker at Synth Repair Services who even exceeded his usual high standards - we requested that everything possible that could be done should be done.

It has had the CC+ CPU upgrade board installed, which adds additional functionality (including Midi) and stability, and a new SPSU power supply kit by Luca Sfregola. Many original ageing parts have been replaced and the synth has been calibrated and PAT-tested for electrical safety. The results are better than we'd hoped for and the synth autotunes without error practically all the time (we cannot guarantee that it won't fail now and again, it is a Chroma).

It comes loaded with four banks of 50 sounds courtesy of the CC+ kit and sounds fantastic; the wooden keys are a delight to play and overall the synth looks beautiful. This Chroma has had a quiet life and is consequently in very good cosmetic order, with no major flaws to the finish. The wooden end cheeks have some scuffs, dings and staining - as you'd expect from a vintage synth - but there was nothing overly detrimental to its appearance. Some people like a modern re-finish, but we prefer where possible to leave the original and appropriate vintage patina on vintage equipment. There has been no touching up of the paint/metalwork anywhere - a few minor nicks and chips are present. A couple of keys have some very light pitting and the control panel finish is starting to lift around the screws at the very edges. Old Chroma flightcases are notorious for the foam distintegrating and this one was no exception - it has been professionally refoamed to a high standard by 3D cases. Included in the sale is the original dual pedal set, the bound manuals, various program cassettes, and of course the Midi breakout box.

There are no known faults with this synth."