Juno 60, controlled via Ableton Live

YouTube via RedRoomNW.
"Running through the abilities and sounds of the Juno 60, connecting to it via the DCB port with a MIDI adaptor and then sequencing with Ableton Live. From Live I am looping a simple Bobby O style rif and running the Juno through its ADSR settings, waveforms, noise filters, chorus, up/down octave, etc..."

U-MAX

Another shot of the U-MAX via JMCO.

MIDM

Title link takes you to a video of the Elektron Machinedrum via Rui on AH.

CONDOR SAXOPHONE SYNTHESIZER by HAMMOND

via this auction.
"For sale here is an ULTRA rare synthesizer (the VERY FIRST) for any wind instrument. It was made in the very early seventies buy Hammond (the organ folks). The synth unit is stored in it's own locking carrying case...the key is included. The power cord also stores in it's own locking compartment...the same key locks this too. When performing, the synth unit is locked to the top of the extended carying handle. The synth unit has slider controls for intensity and rate of vibrato, control of treble and bass, tone and volume, sensitivity, mono or stereo signal. It also has organ type switches for Repeat, attack, tremolo/vibrato,sub octave, dyna mute, fuzz, bass sax, tuba, bass clarinet, basson, English Horn, cello, natural amplify, horn, oboe and soprano sax. The front of the unit has a stop bar to cut signal and two micro inputs from the horn's contact mic . It does not include a contact mic. The only missing part is one of the pulls at the side of the unit that release the handle so it can be raised to withdraw the synth unit."

Davis Development Analog Sequencer

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"Up for auction is an analog sequencer made by "Davis Development" for use with analog synthesisers that have cv/gate inputs. This unit appears to be either A: a prototype, B: a one-off someone made in the late seventies or C: from a kit. Not sure which, but, have you seen another? I can't find anything online about it, but it seems to have been built by a serious pro. The main board is all point-to-point wiring, but very nicely done (this definitely was not an amateurs work). It has been in fine working condition since I've owned it, although it does show its age here and there (see pics).

It should be noted that this sequencer apparently puts out a "volts per hertz" output at the "pitch out", and a "gate" at the "trig out" (both 1/4"). This explains why it works fine with the EML-101. The EML, Korg MS-series, and a few others use this type of interfacing. ARP, Roland, Moog, etc. use a "volts per octave" system, which seems to be the more common. It works with that type as well, but adds a (sort of) "ring-mod" effect to the oscillator(s) its driving. Just thought you should know, to avoid future issues (don't want any unhappy customers...) :~)

O.K., back to the details. It has a momentary button under each of the 8 steps (handy for "tuning in" your sequence), as well as a "random" on/off button, "clock" on/off, and a "range" thumbwheel switch (for making it 4-step, 2-step, 5-step, etc.). The CV output is not quantized."

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Vermona Synthesizer

Title link takes you to shots via this auction.

"This auction is for vintage analog synth VERMONA “SYNTHESIZER”. It’s made in DDR (Germany) in 80s. This 2-VCO monophonic analog synthesizer (like Moog Prodigy, Oberheim OB-1 etc.) have VCF with 24 dB/oct filter, single LFO and classic ADSR VCA envelope. Sound is really original, warm, deep, analog!

Condition is very good and full working. All keys and knobs work fine. Photos are actual. Instrument has original configuration: without midi or CV. Power - 110/220V. Out - 1/4 Jack."

As always be careful. This one is a bank wire transfer.

Casio MT-600 Filter Mods

YouTube via rolandsh1000.
"This is a demo of the effect of some circuit modifications to my Casio MT-600. Taking control of the onboard analog filter turns this thing into an altogether different keyboard. I've documented some of these mods here"

Kurzweil 250 RMX

via this auction.

"When the Kurzweil K-250 was 1983, the music industry was astounded by its ability to emulate acoustic instruments with extraordinary accuracy. The K250RMX is a rack mount version of the K250 keyboard. The instrument features very high quality sounds utilizing Kurzweil's exclusive Sound Contoured Modeling technique."

Sequential Circuits Pro-One Modded

Title link takes you to shots via this auction.

"It has a little modification on it, it's got mod Ext CV Amt nob on top right above the wheels, MOD CV INPUT, VCO A switch, PB CV INPUT, PB CVIN OFFSET switch on the back."

Synthesizer von gestern vol.2

via this auction. Vol 1 here.
Update: check out the comments if you are interested in this book.
"Synthesizer von gestern vol.2 (in German)
Matthias Becker, 1995. 148 pages, A4, high quality full colour pictures by Dieter Stork.

Matthias Becker, born in 1955, has been involved in the world of synthesizers for more than two decades. During the eightes he ran a school in Koeln concentrating its activity on the theory and practise of the synthesizer. Matthias Becker is considered beeing an expert on Vintage synthesizers. His large collection of synthesizers have been publicly exhibited Osnabruck, Leipzig, Hamburg and Frankfurt.

This is Matthias Becker´s second book with historical synthesizers. One of the best book ever!"