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other sources are digikey, Distrelec, RS, farnell, reichelt, Conrad, Uk-electronik, banzai (call the guys about the stock), thonk.
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use eBay or tme for the SMT caps to safe money
Tempco resistors and matched pair transistor are available by me:
https://www.diysynth.de/diy-components/passive-komponenten/tempco/tempco.html
https://www.diysynth.de/diy-components/aktive-bauteile/gematche-transistoren.html?language=de
The ssi2131,as2164,as3109 are available as a bundle by
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| Info ID | Date | Location | Type | Issue | Tip | |
|---|---|---|---|---|---|---|
| 1 | 13. Aug.2022 | Hardware Board | INFO | minimize Slider/Potentiometer malfunctions Soldering Info | when you install the sliders, DO NOT solder all pins successively, solder only one pin at the top and the bottom and proceed to the next slider, when you have installed all of them - solder the next single pin of each slider. this has to be respected with potentiometers too. The Sliders and Potentiometers have lubrication inside which is sensitive to heat and can be easily damaged (this mistake was made in many Syncussion clones ) | |
| 2 | 13. Aug.2022 | Hardware Board | INFO | OLED Selection and R101/R32 - R100/R102
| when you have an OLED with the PINOUT: VCC-GND-SCL-SDA install R100 and R102 (0 Ohm - a bridge) (R32/R101 must be left empty) in case you have an OLED with the PINOUT: GND-VCC-SCL-SDA install R101 and R32 (0 Ohm -a bridge) | |
| 3 | 13. Aug. 2022 | All pcbs | INFO | some IC Sockets do not point in the same direction as the others, it´s a known issue that people install ICs backwards | Double and triple check every IC orientation - maybe 80% of all device malfunctions happen because of that and often end in very expensive repairs | |
| 4 | 13. Aug.2022 | Hardware Board, PSU, Mainboard | INFO | the LEDs do not work | when you build the device - its important to start with the power supply - here you can test the LED orientation. never trust the vendor pinout for LEDs. normally the long LED leg is the positive end (anode) (but some circuits are powered from negative rails and GND is the positive end in this case- just as an explanation) | |
| 5 | 13. Aug. 2022 | Mainboard | INFO | solder the pins on the Edgecard holder where you find the white stripe on the PCB -
| you can't install the edge cards in the wrong way | |
| 6 | 14.Aug.2022 | Mainboard | INFO | keep the length of the power cable as short as possible - that minimizes the risk that you accidentally put the PSU card in a voice card slot | ||
| 7 | 14.Aug.2022 | Hardware Board | INFO | pay attention to "Pot23 - Volume" (upper right corner) this is the one non-center detent pot. | ||
| 8 | 14.Aug.2022 | Mainboard | BUG | BOM1.0 Change- fixed in BOM v1.0.1 R103, R104, R105 = 330K (was 30k in BOM rev 1.0.0) R128, R143 = 10K (was 30k in BOM rev1.0.0) R137, R146 = 10K. (was 20k in BOM rev1.0.0)
| fixed on 24.Sep.2022 in BOM 1.0.1 | |
| 9 | 03.Oct.2022 | Parts | INFO | the 2N3094 on the Voicecards must be a matched pair (within 2mV vbe) | A. if you are a pro builder.. you still have a device to match trannys. B. you can order or build a tester C. you order matched pairs by me or thonk https://www.diysynth.de/diy-components/aktive-bauteile/gematche-transistoren.html?language=de |
PCB Scan Pictures (thanks Janne.I)
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- install the SMT capacitors as before described in the Breakoutboard section.
- install the SMT ICs
- install the resistors - solder all pins, do not install the Tempco Resistor yet
- install the ceramic capacitors - solder all pins
- install the IC sockets - standard IC sockets preferred - solder all pins after you have checked the alignment
- install the Transistors/matched Transistor pair (2N3904), regulators - do not overheat the pins here
- look in my above guide - about the 240pf capacitors - maybe you have to select or match something - its not needed but for some builders just a notice
- install the Filmcapacitors/Electrolyte caps and solder one pin - align the capacitors before you solder the second pins.
- wash the pcbs as described before
- when the pcbs are dry - install the Trimmers
- install all ICS
- install the Tempco resistors - this must be thermal connected, use thermal paste paste
- use shrink tube for the 2N3904 pair and thermal paste
- double and triple check the IC orientation
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