This 80ies east german keyboard features a true 3 line BBD chorus section by the likes of solina and logan plus a 3 band eq that is accessible now via jack. Look for Mod 1-3 in section ST2. Thanks to vermona and Lutz Würker for sending the schematics. Time: 30min.
Got this organ with guts from the infamous GX-1 and the CS80. After the modification we got full access to the 2 polysynths (7 voices 2 OSC and LP+HP filter each) and the monophonic bass synth. 3 times 16 controls in total: 4 Filter controls (Low pass filter frequency, Low resonance, High pass filter frequency, High pass resonance) 5 stage Filter Envelope Generator (Initial Level, Attack level, Attack, Decay, Release) 4 stage Voltage Controlled Amplifier Envelope Generator (Attack, Decay, Release, Sustain) 3 waveforms possible for use in parallel (saw, square, narrow pulse) CV-control for…read more
This one was suffering from juno cancer on one voice. Uncoating the 80017 chip did partially not work (no resonance). Put a replacement chip on a socket and recalibrated all of the 6 voices. Took 3h Mods: 350€ + parts + postage (No VAT (small business §19 (1) UStG)) For the chorus there was used a test-point on the board as input and a new pot was installed for chorus speed. Very useful! 1-2h
Duration 6h for Mods: 350€ + parts (knobs+housing+HKA Kit) + postage (No VAT (small business §19 (1) UStG)) Got this defective, rewired some loose ribbon cables and exchanged the HH-slider. Mods are CH+OH+Ride decays and tune for ride (40106 clock not too stable). replaced it with an LTC. Harry Axtens HKA eprom mod was also installed and kicks ass!! RENT GEAR HERE: Thx to www.discrete-audio-solutions.com for the parts. More info here: http://electro-music.com/forum/topic-37316.html
Yamaha CS-80 Kenton MIDIfied. Duration: 7-8h. Sequence and Program Changes in Ableton Live. Welcome to the future you litte 90 kg beast from 1977:) i will perform this to your CS-50, 60, 80 as well! And another happy customer:) More info: http://www.therogoffs.com/cs80/MIDI/cs80midi.html
Yamaha CS-60 Kenton MIDIfied for a friend in canada. Duration 5h.
Those great sounding 70’s preamps from the former GDR broadcasting with discrete design and transformers were found on a local fleamarket. Now they needed recycled wooden housings (dia boxes) powersupplies und XLR inputs/outputs. Not the most versatile preamp (no low cut,48V) but perfect for dynamic mics. Really pleased with the coloured tone and the huge amplification of 70dB!! V740 schematic:
