Octave The Kitten Vintage Analog Synthesizer

via this auction

"The rare little brother to "the Cat" synthesizer."

Vermona Synthesizer

via this auction

"Vermona synth made in West Germany."

West Germany or East Germany?

Roland TB-303 Vintage Bass Line Synthesizer with Black Bag

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

"Roland TB-303 Bass Line. The original black carrying bag, Boss 9v AC adaptor, owner's manual and 4 new C cell bateries are included"

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Muse Research Receptor

via this auction

Note the USB port.
The Receptor 2 is out BTW.
This is the original Receptor

auction details:
"Muse Research Standard Receptor Rack Synthesizer Plug-In Module
1.0 Revision C. 1GB RAM. 150GB hard drive. With Ivory and Elektrik Piano installed

General Description
One instrument... Two rack spaces... Millions of sounds... Infinite possibilities.
That's the Muse Research Receptor - a unique and versatile musical instrument that takes the best software-based synthesizers and effects processors available, and turns them into real instruments. With the push of a button, Receptor can transform itself from a sampler into a guitar processor; from a drum module into a synthesizer; or from a delicate mastering tool into a screaming drawbar organ.

Plugin software has completely changed the way we make music. Puny samples crammed into tiny chips are a thing of the past. Fixed architecture synths, by their very nature, are forever incapable of adapting to an ever-shifting sonic landscape. In today's musical world, virtual instruments reign supreme. But using plugin software can be an exasperating experience. Stability concerns and high latencies limit their effectiveness on stage, and high CPU demands limit their flexibility in the studio.
Receptor solves these problems by combining everything that's good about plugins with everything that's good about hardware."

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Synthesizer-Magazin #13

via sequencer.de

"Analog-Synthesizer:
* Analogue Solutions Leipzig

Semimodular Analog:

* Future Retro XS
* Sequencing V2.0? Numerology 2, Consequence
* Elektron Monomachine
* Native Instruments Kore 2
* Ausstellung “Zauberhafte Klangmaschinen” in Wien
* Interview: Anne Clark
* Interview: Qntal
* und vieles mehr"

dr55buchla

via mono-poly's public channel where you will find more.
"Self playing patch witch uses: Buchla 158 (2x) DIY Wogglebug, Wiard Noisering, Gated Comporator, 2x Wiard vca, DR55, Rythm Ace"

Replacing the Floppy Drive an an AKAI S900

"This is the experience of a guy that succefully fitted an Amiga 600 floppy drive on an AKAI S900."

You can find the post on the AKAI S900 blog.

MIDIBass 303 Installation

You can find the instructions, images and video on Sequentix.com.

Update: also see the old site.

MODDED Commodore 64 for Prophet64/MSSIAH

via this auction
"Features:
+ 4 skull analogue controllers, with on/off switch
+ Custom frankenstein grey case
+ 1 x 6581R4 SID chip (with the sweet filter)
+ Cartridge on/off switch - saves wear & tear on the port
+ Feedback mod fitted (sends output back into the input for resonance effects)
+ Audio in/out by 2 x 1/4" jacks
+ Custom designed key graphics with prophet64 functions
+ Custom underside label Serial # 001
+ days of work put into it!"

Note the MSSIAH software is not included

MODDED Commodore 64 for Prophet64/MSSIAH

via this auction
"Features:
+ 4 analogue controllers, with on/off switch
+ Custom green textured & yellow painted case
+ SID2SID installed with 1 x MOS 8580R5 and 1 x 6581 SID chips
+ Cartridge on/off switch - saves wear & tear on the port
+ S-Video out mini-DIN socket for a sharper image.
+ Feedback mod fitted (sends output back into the input for crazy resonance effects)
+ Audio in/out by 2 x Stereo 1/4" jacks
+ Custom designed key graphics with prophet64 functions
+ Custom underside label Serial # 001
+ days of work put into it!"

Note the MSSIAH software is not included