Georges Jenny Ondioline

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video upload by olivier olivier

"Full serviced Ondioline to sell (huge and amazing hours spent to service this superb Ondioline)"

via this listing

A few pics of the inside below.

"Nowdays Ondioline are becoming extremely rare even in France where they were hand-crafted during the 40's to 60's

This one is in VERY good condition AND is absolutely a real and magic pleasure to play- Nothing except original Ondes Martenot can provide such a feeling and so organic sounds !

Tuning is perfect (A440 on all 4 octave for each key)

This particular model has the great and very efficient improvement : Sub OSC for very loud sub harmonics if needed !

it has been fully serviced from September to December 2023 by very competent technician who spent around 50 hours to do the huge work needed for a very nice AND playable Ondioline

(this tech knows the Ondioline as he serviced in the past over 10 units)

He has done a very meticulous and respectful work (all electric wires have been changed, new components when necessary, PSU serviced, ground connection, all keyboard connectors cleaned for a good contact, and completely level keyboard...HUGE work !!)

the Knee level barrer is a new one, the string (useful for 'Castagnette' , Bongo ...) is the original one and of course efficient.

You might know there are differences between Ondiolines due to the technology evolution, hand made craft, components...) so please don't compare with an other one which will sound different

Have a look and listen to what this one is capable of

(video taken on 3rd April 2024 )"

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Vintage Roland Juno-106S Analog Synthesizer SN 521570

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via this listing

Pics of the inside including the speaker enclosures below.

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Roland Juno 106 with Kiwi Upgrade

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video upload by ohm_studi_ohm

"The Kiwitechnics Kiwi 106 is a major upgrade to the iconic Roland Juno 106 which adds too many features to be listed here, so just check their website.
Among those the ones I think would alone justify the upgrade are: arppegiator, LFO extra waveshapes with sync possibilities and extra key modes (among which a real monophonic mode and a unison mode with adjustable detune). Here is a quick demo of those features.
Once again i'm only scratching the surface of what's possible with the mod but if you're familiar with the 106 sound and playability you'll have an idea of all the new territories it can cover.
Actually making it quite close to the Jupiter 4 (despite the Jupiter 8 style overlay :-)"

via this listing

"This unit was serviced and upgraded:
- Kiwitechnics Kiwi 106 upgrade was fitted and updated to the firmware v2
- The 6 VCA VCF voice cards were unsoldered and cleaned of their resin coating with acetone and fitted on sockets, so that in the future you could replace a faulty voice without any need for soldering.
- power supply capacitors were replaced
- 16 faders from the control panel (all the fader except for the HPF) were replaced by new ones
- original leds were replaced with blue ones
- blue display was fitted
- clear bender was fitted
- unit was calibrated
- SynthGraphics Jupiter 8 theme panel overlay was fitted. Please note this is based on the Kiwi 106 v1 so there are a few discrepancies in the layout since the upgrade is now in version 2. Only minor differences that would not justify an overlay replacement IMO

Cosmetic are very good with only minor signs of wear."

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Fender Chroma Polaris Model 2123B Analog Synthesizer Minus Half the Overlay

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via this listing

Additional Retro Gear Shop Listings

This one is listed for parts. Thought it was interesting to see what's underneath the front panel overlay. Click on the pic to zoom in.

Pic of the inside below.

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Arp Rhodes Chroma Keyboard Expander Dual Channel Voice Boards

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via these listings

Additional Retro Gear Shop Listings

"Rare vintage spare Dual Channel Bd circuit board Assy-7225601 Fab 30-5422801 for your Arp Rhodes Chroma Keyboard or Expander. Previous tech notes it was tested and working in 2015, but I have not tested it as I no longer have any Chroma keyboards to test with, so this is sold as-is with no guarantees, for parts/repairs. Very useful if you have a Chroma you need to restore and looking for this piece. We have many other rare Rhodes Chroma parts for sale, please check out our other listings."

Note the white board below is a Rev 3 board: "Assy-7225601 Fab 30-5422801 Rev 3"

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1980s DIY Elektor Chorosynth

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via this listing

"Ein Elektor Chorosynth.
Es ist dem Stylophone ähnlich, nur wurde hier eine Tastatur ergänzt.

Alle Funktionen sind soweit gegeben, der Klang ist ähnlich einer Orgel.

Die untere Taste hat keine Funktion (Kabel ab), ein paar Tasten haben leichte KontaktProbleme

die Bauanleitung findet man online.

Mit Stromkabel und Adapterkabel von DIN auf Klinke."

Googlish:

"An Elektor Chorosynth.
It is similar to the Stylophone, only a keyboard has been added here.

All functions are present, the sound is similar to an organ.

The bottom button has no function (cable disconnected), a few buttons have slight contact problems

The construction instructions can be found online.

With power cable and adapter cable from DIN to jack."

Pics of the inside below.

See this previous post for the board w/ touch plate only.

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Octave Plateau Voyetra 8 Poly Analog Synth SN BN2804A

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via this listing

Additional Retro Gear Shop Listings

Pics of the inside below.

"This is one of the great classics of vintage synthesizers, on similar league with other great classics like the Roland Jupiter-8, Elka Synthex, Sequential Prophets, Oberheims and Moogs. The Voyetra is a magical huge phat sounding machine with amazing capabilities. This one just got back from servicing by Peter at DoubleTake, one of the last experts around to handle and service these synths, with big cost and long wait time to get servicing completed. Peter gave it everything he felt it needed and Peter has been kind enough to offer communication with any new owner about the work and servicing done."

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Oberheim Xpander

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via this listing

Pics of the inside below.

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Luma Luma-1 Walnut 120v Drum Computer

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via this listing

Additional Retro Gear Shop Listings

Pic of the inside below.

See a Luma-1 vs LM-1 sound comparison with Roger Linn here, and see the Deftaudio label for additional posts.

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SoundMaster ST-305, Roland Jupiter 4 & Echolette SE251

video upload by ohm_studi_ohm

"Quick impro to demo the Sound Master Stix Programma ST-305 (!) analog drum machine syncing the Roland Jupiter 4 arpeggiator. The Echolette SE251 provides echo/reverb.
The ST-305 is an 80s programmable analog drum machine. Very basic, no sound editing but you get 7 sounds, an accent track, dedicated volume faders and outputs for every instrument.
And the icing on the cake is it can be synced to external gear and/or sync other gear, which is a nice feature (you can use it slaved to a sequencer and in the same time slaving a synth, so it acts as a 'through').
I did not know this one till recently and it was a pleasant surprise."

Klemt Echolette SE-251 tape delay.

via this listing

Pics of the inside below.

"This is quite a rare tape echo manufactured by Dynacord. It seems to be one of the very last tape echo introduced by the brand (with the Echolette Echo 400).
It shares many parts with the Echocord line of delays like motor, pinch roller, heads, oscillator board etc
But this one used op amps instead of only transistors for amp stages (the Echocord Super 76 also already used one op amp for the output stage).

The unit has 2 heads which you can mix with the dedicated pot. Otherwise classic features like input volume, tone, echo send level, echo feedback and echo level.
In the back the original DIN socket enabled output and aux input. In this case you only get the wet signal out of the delay, which is nice in a studio environment.

Unit was fully serviced and modded:
- all electrolityc caps were replaced (except 3 bipolar ones )
- original 4x op amps were upgraded to better one (TL081)
- original DIN socket was replaced by 2 jack sockets, one for the output and one for the aux input. Also a pot was added to attenuate the level for the aux input
- unit was meticulously cleaned
- heads were cleaned, demagnetized and aligned
- unit was calibrated
- tape is new

The unit is in perfect working order and in excellent cosmetic condition."

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Waldorf Microwave 1 Rev A

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via this listing

Additional Retro Gear Shop Listings

"Previous owner mentions it was serviced and recapped. We noticed the glass on the screen appears to be a little loose but this does not effect operation. Otherwise it's tested and fully functional. Screen is bright and easy to read. This one has Curtis CEM 3389 which would make it a Rev A (as opposed to a later Rev B version with Curtis CEM 3387 chips). Some say the Rev A is the better sounding version. Classic Waldorf rack synthesizer."

Pic of the inside below.

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Supercritical's YouTube Thing Episode #3 - "Redshift(s) assemble!"

video upload by Supercritical Synthesizers

"Welcome to the grass roots level of the development story of our newest product Redshift 6! We thought you'd be interested to see a more detailed look inside the process. We try to keep it raw and honest. We'll try to make these once in a while.

Short episode this time. But major progress this time. See for yourself and come check it out in person at Superbooth 2024.

The Supercritical Redshift 6 will be available in summer 2024 with an MSRP of 1259€
Preorders open now at https://supercriticalsynthesizers.com"

Two Vintage Arp Quadras

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One via this listing, and one via this listing

Additional Retro Gear Shop Listings

Two pics of the inside below.

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Axel Hartmann Neuron Synthesizer

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via this listing

Pics of the inside below.

"When I turn on the synth, the message 'Welcome to ' only pops up and it doesn't work. I sell it because there is no place to repair it in Korea."

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Tandy Orchestra-90 Stereo Music Synthesizer

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Three videos of the Tandy Orchestra-90 Stereo Music Synthesizer. The Orchestra-90 was featured on the site once before in this listing from 2013. This is the first post to feature demos and a look inside. I found them after seeing the new listing below.

Playlist:
Orchestra-90 Stereo Music Synthesizer
CoCoTracker - Orchestra-90 - 6309
Orch 90 repro plays 99 Luftballons on the TRS-80 Model 4

via this listing

"Introducing the Tandy Computer Products The Orchestra-90 Stereo Music Synthesizer! This high-quality music synthesizer is perfect for both amateur and professional musicians alike. With its advanced technology and user-friendly interface, this synthesizer is sure to take your music to the next level.

Featuring a sleek design and top-of-the-line features, this Tandy synthesizer is a must-have for any music enthusiast. Whether you're looking to create your own unique sound or simply want to enhance your current music projects, the Orchestra-90 is the perfect tool for the job. With its exceptional sound quality and versatile capabilities, this synthesizer is a true game-changer in the world of music."

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ARP 2600 Black/Orange

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via this listing

Pic of the inside below.

"ARP 2600 with 3620 Keyboard. Clean and in as close to mint condition as one could get. Includes covers. The AC inlet was modified to accept standard 3 prong removable cable. Repaired VCO2 and VCO2 Sub Board. Clean sliders, connectors and switches. Solder broken wire at reverb input tank which had fallen off. Calibrate and tune. Burn-in and functional test. Stays in tune. Ships to the lower 48 states only. Local Pickup available."

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Assembling Grp A4 2024 Series

video upload by Grp Synthesizer

"The Grp A4 Synthesizer 2024 Series production goes on, and on, and on, and on..."

LinnStrument Disassembly 2024

video upload by Roger Linn

"Roger Linn demonstrates how to disassemble and reassemble and LinnStrument in order for owners to perform parts replacement or repairs at home without sending it away."

Roland Jupiter 4 early rarest version (w BA662 filters) + flight case (SERVICED) SN 902159

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via this listing

"This is the rarest early version with x4 BA662 filters for each voice

with more punchy and fat sound...(despite the latest versions which have only 1 IR3109 filter chip for voice)"

Pics of the inside below.

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A Tour of The Farfisa Super Synthaccordion

video upload by Chicago Electric Piano

"Our Combo Organ Tech Keegan "Krazy Keegan" Meuris walks us through the unique and vast features of Farfisa's most advanced Combo Organ/Accordion ever built, the Farfisa Super Synthaccordion.

You'll see features, hear sounds, and learn history about the Super Synthaccordion in this comprehensive overview of Farfisa's finest Accordion related creation ever to be built."