These were spotted and sent in via Florian Anwander. If anyone knows if there is more info out there on these aside from what's listed in the auctions, let us know. Giving them a tuberetrosound label for now as that is the seller's name on eBay.
The top system is via this auction
"Offer DIY analog synthesizer, playable as Synthe bass with built-in + switch by 1 octave transponable keyboard or via external CV / gate control over 7 octaves playable. Soundhammer with 2 x DIODE LADDER VCF and 2 parametric filters."
The second via this auction"Sell analog synthesizer module with SEQUENZER and analog drumsounds, built as an inexperienced experimental system. Inputs 2 x CV (1VOLT / OKTAVE and GATE 0 VOLT and 5 to 12 VOLT). Outputs Stereo.
Stability after 10 minutes, 24 db cascade filter.
All the details are recognizable by enlargement of the photos.
Supplied with circuit boards. Only for the experienced connoisseur. Pure analog technology with MIDI CV Converter or Oberheim OB2 - keyboard to play. Without guarantee and without withdrawal."
And the third is an Analog Synthesizer CV+GATE Keyboard via this auction"Provide DIY Precision - Analog 2xCV, 2xGATE 3 octaves Keyboard for analog synthesizer with playable CV range of 7 octaves, built-in LFO's and very good playability of the keyboard.
The keyboard is exactly the same as the synthesizer module and is 2-voice (duophone) or monophonic, 2 x separate PORTAMENTO.
The idea came from the OBERHEIM 2 VOICE KEYBOARD, which was expanded a bit.
The KBD is matched and should warm 10 minutes."
The following images are of each in order.
