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BackA bunch of diodes and support Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on the "aoKicad" and "Kosmo\_panel" links on the GitHub page (they'll have "@ something" after them) and download them as separate sheet wants to merge 5 commits from bugfix/v1.1 into main 3d279dd88c Finish schematic, add PDF' (#2) from schematic by Eeschema 5.1.10-88a1d61d58~90~ubuntu20.04.1 **Component Count:** 74 **Component Count:** 76 Docs/precadsr_layout_back.pdf Normal file Unescape Hardware/PCB/precadsr/ao_tht.pretty/R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal.kicad_mod Normal file Unescape D Rotary switch, 4-bit encoding, 16 positions, Complementary code K rotary hex Gray D 1x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol D 5x DIP Switch, Single Pole Single Throw (SPST) switch D reed switch, default-closed D SPDT reed switch K switch sp3t ON-ON-ON D Switch, single pole double throw | | | | R31 | 1 | Conn_01x02 | SIP socket, 2.54 mm, 1x10 Pin socket, 2.54 mm, 1x2 (see build notes) 1 SIP socket, 2.54 mm, 1x10 Pin header, 2.54 mm, 1x7 | | | R30 | 1 | AudioJack2_SwitchT | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling)"/>