Kobol Clone
Projecttitel: RSF KOBOL Clone
Status: FINISHED
Startdate: 01/2019
Duedate: 02/2020
Updated: 02/2023
Manufacture link: deliandiver.com
https://www.muffwiggler.com/forum/viewtopic.php?t=203509&highlight=
Summary:
works, but its not for beginners and until the developer do not change the PSU from Main AC to Walwart psu its definitely not for beginners.
you need 2x SSM2050 or use 2055/2056 with a mod.
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 |
|
|
|
|
22 | knobs ask Patrick_H |
|
|
|
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 |