“Custom-modified Oberheim TVS-1 two-voice synthesizer, with one SEM replaced by a custom patch panel providing access to all SEM, Sequencer, and Keyboard patch points. Modifications done in the early 90’s by the late great Andy Topeka, keyboard tech for the Rolling Stones, David Bowie, myself, and many others. Modification highlights include a switch to convert the sequencer from 8×2 to 16×1 with blue LED indicator. A full list of mods follows below.
PLEASE READ THE FOLLOWING CAREFULLY AND THOROUGHLY
Serious bidder and serious inquiries only.
100% fully functional. The only things missing are the cover (does not exist) and the pot caps on the sequencer. Overall condition is good – very good, but if you’re looking for a museum piece this isn’t for you. Additional pictures to show condition available upon request.
• original schematics and manual
• power cord
• a selection of ⅛” patch cords
• a copy of my original modification and patch panel schematic
As previously stated, this TVS is fully functional. But being a vintage synth, it is being sold as-is, no returns. I will pack it excruciatingly well to prevent damage in shipping.
I have been an ebay member since 1992 and I’ve maintained a 100% feedback rating. You will not be disappointed in the synth, the packing, or the communication you receive from me.
Patch Panel #1
• (2) 1 in/1 out attenuators
• (2) 4-point mults
• (2) KCV outputs
• (2) Quantized AND Analog outputs, one from each row of the Sequencer
• Clock (Step) and Reset inputs for the Sequencer
• Keyboard Gate
• Sequencer Gate
Patch Panel #2
• (2) attenuators to the filter’s inputs, one from the KCV, the other connecting the VCF EG to the exponential response input to the VCF
• (2) VCO CV inputs (one for each VCO)
• VCF CV inputs
• Individual VCF outputs: LP, HP, BP, Notch
• VCA CV inputs
• LFO reset
• (2) EG gate and outputs
• Noise from S/H hardwired to the #1 input of the EXT. pot on the filter
• Line Output switch with red LED on/off indicator, extremely useful for private programming via headphones without sending audio to line out
• Kill Switch for VCO #2 (to prevent any possibility of bleed when using only VCO#1)
• Decay Switch, sets EG#1’s decay to 0 (short to ground). This was originally intended to switch in a fixed-value resistor so that the decay time could be toggled between a specific (short) value and the pot, but this modification was never completed.
• Sequencer: switch provides either normal 2×8 operation or custom 1×16 operation, seamlessly scanning between Row 1 and Row 2. Blue LED indicator illuminates when Row #2 is being scanned.
• Original red LED’s indicating EG trigger replaced by blue LED’s
• power cord is a standard IEC type, power receptacle replaced with IEC connector
• original multi-pin connector still present on rear (though I am not sure if it’s connected to anything)” Click here to visit listing on eBay