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A CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules 811ef45c764021f623b8bb59234df1314fce4e91 12V, -12V and ground needed, probably up to 1amp - maybe not as efficient as a result of switching to pcb-mounted panel components version Latest commits for file Schematics/SynthMages.pretty/PinSocket_1x02_P2.54mm_Vertical.kicad_mod Latest commits for file Schematics/SynthMages.pretty/Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles_Shaft_Centered.kicad_mod Latest commits for branch smt_version Notes about component heights, swapping rotary and toggle switches smt_version Merge pull request synth_mages/MK_VCO#3 From 3d0ca7fdf6e2ad8d7864221e585c668e46544055 Mon Sep 17 00:00:00 2001 .../Panels/FIREBALL VCO.png | Bin 0 -> 18829299 bytes resistor_keyboard.diy | 497 create mode 100644 Hardware/PCB/precadsr/ao_tht.pretty/DIP-8_W7.62mm_Socket_LongPads.kicad_mod create mode 100644 Hardware/PCB/precadsr/ao_tht.pretty/Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical.kicad_mod delete mode 100644 Hardware/PCB/precadsr/ao_tht.pretty/C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2.kicad_mod delete mode 100644 .gitmodules delete mode 100644 Hardware/PCB/precadsr/ao_tht.pretty/C_Rect_L7.2mm_W2.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2.kicad_mod delete mode 100644 Hardware/PCB/precadsr/ao_tht.pretty/PinHeader_1x02_P2.54mm_Vertical.kicad_mod delete mode 100644 Hardware/PCB/precadsr_aux_Gerbers/precadsr-NPTH.drl create mode 100644 Hardware/PCB/precadsr/Kosmo_panel.pretty/Kosmo_Jack_Hole_NPTH.kicad_mod create mode 100644 Hardware/PCB/precadsr/Kosmo_panel.pretty/fastestenv_LED_Hole.kicad_mod delete mode 100644 Fireball/Fireball.kicad_dru create mode 100644 Hardware/Panel/precadsr-panel-Gerbers/precadsr-panel-PasteTop.gtp create mode 100644.

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