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Projecttitel:Nava TR-909 CloneStatus:
Startdate: 01. May 2016Duedate: July 2016update march 2017 update Jun 2017 Manufacture link: http://www.e-licktronic.com/en/nava-parts-kit/50-nava-tr909-clone.html |
Table of Contents
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Bugs
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update the Firmware v1.023 (30 May 2017)
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http://www.e-licktronic.com/forum/viewtopic.php?f=24&t=1233&p=7905#p7905
MIDI SYNC ISSUE (only if happen)
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Replace R365 value by 1K and R314 value by 4K7 to increase Midi signal should solve this issue
only for rev.1.00 pcb: (not for 1.01, 1.02)
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Issues: (respect the change for C89 and C163 too (to 10nF) Afaik the first pcb (v1.0 ) has 3 bugs, all of them are highlighted in red in the build guide and are easy to fix. SD: http://www.e-licktronic.com/forum/viewtopic.php?f=24&t=970&hilit=snare+q43&start=40#p5823 Q43, Q46, Q49 Mixed Collectors and Emitters This is a mistake. When we designed Nava SD PCBs, we placed this transistor to act like switches to generate SD envelopes. We had some sound test and it was okay for us but this transistors should act like amplifier. To solve this issue you need to bend transistors pin 1 and 2 to swap their position in the pad. Master: http://www.e-licktronic.com/forum/viewtopic.php?f=24&t=850&hilit=master+mods&start=10#p4855 To bypass the muting circuit simply omit both transistors Q82 and Q83 and you don't need all part from the muting circuit (C142, C143, D193, D194, D195, R468, R469, R470, R471, R472) |
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open: check in BD C8 for closer BD Decay (the Nava Decay is bigger as the original)
modify C153/ C154 to 10uF check: http://www.e-licktronic.com/forum/viewtopic.php?f=24&t=850&hilit=master+mods&start=50 & https://www.gearslutz.com/board/electronic-music-instruments-electronic-music-production/584333-tr909-owners-stereo-out-less-bass-than-individual.html
MODIFICATION:
my version was build with addon second Noise source for fixing the loudness balance with snare and handclap
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MUX BOARD:
http://www.e-licktronic.com/en/nava-parts-kit/57-mux-sh-boards.html
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Bill of Materials from S_H Board v1.00.sch, 16 parts, grouped by values, as of 26/09/2017 10:33:34
| Part | Value | Device | Package | Description | Qty |
| C1, C2, C3, C4, C5, C6, C7, C8 | 470p | C-EUC0805 | C0805 | CAPACITOR, European symbol | 8 |
| C9, C10 | 100n | C-EUC0805 | C0805 | CAPACITOR, European symbol | 2 |
| IC1 | 4051A | 4051A | DIL16-S | 8-channel ANALOG MULTIPLEXER | 1 |
| IC2 | 4051D | 4051D | SO16 | 8-channel ANALOG MULTIPLEXER | 1 |
| IC3, IC4 | TL074D | TL074D | SO14 | OP AMP | 2 |
| J1, J2 | MA03-1 | MA03-1 | PIN HEADER | 2 |
Power connection with MTA156
Schematics:
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Nava_v1.0 silkscreen.rar (brd File)
PCB layout:
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User manual
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