Kobol Clone
This documentation is only for myself, to have some notes about changes and mods
This PCB which I used isn't available anymore !!
Theres no support available and much knowledge needed.
Sync sounds:
Backup from Crazy.P incl. SSM.-SSI adapter pinout
ISSUES
Nr. | Description | Priority |
| Solution |
|---|---|---|---|---|
1 | Switches - use other pcbs footprint size and/or change panel to toggle switch | 1 |
|
|
2 | BOM : LOG for Volume LFO and VP out gain | 3 |
| fixed |
3 | missing mounting holes for pcbs | 2 |
| open |
4 | LED driver needed for gate led | 2 |
| fixed |
5 | leds polarity on pcb | 3 |
| fixed ? |
6 | LFO speed inverted pot, left is fast on the prototype | 1 | Or use reveresed Poti | fixed |
7 | panel holes too big for potis | 1 |
| open |
8 | powersupply design not allowed - | 2 |
| open - use a own PSU - Yamaha PA30 and resctifier, capactitors |
9 | markers for voltage test points missing | 3 |
| open |
10 | more clearly infos about matched trannys and resistors | 3 |
|
|
11 | envelope change too CEM3310 or digital | 1 |
| open |
12 | capacitors are too close next to the power supply section on mainboard | 1 |
| fixed |
13 | use bigger traces | 1 |
| open |
14 | Gate signal bleed in LFO | 1 | Blocker | fixed |
15 | V/oct unstable - waveforms wobbling - | 1 | Blocker | fixed |
16 | Lfo led not working | 3 |
| fixed |
17 | Holes in vcf board and VCO board to mount on metal spacers - for better mounting | 2 |
| open |
18 | Case doesn't fit with the panel | 1 |
| workaround possible |
19 | ua726 | 1 |
| use normal matched pair trannys |
20 | ssm2040 | 1 |
| use the new SSI 2040 !! |
21 |
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22 | knobs ask Patrick_H |
|
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23 | connector 2pin | 13x | JST XH2 | https://www.reichelt.de/jst-stiftleiste-gerade-1x2-polig-xh-jst-xh2p-st-p185073.html?search=jst+st |
24 | connector plug 2pin | 13 | JST plug | |
25 | pin connector | 26x for 2 pin 2x 3pin | JST |
|
26 | connector 3pin | 2 | JST | |
27 | connector plug 3pin | 2 | JST | https://www.reichelt.de/jst-buchsengehaeuse-1x3-polig-xh-jst-xh3p-bu-p185086.html?search=JST+XH |