Have the right skills, tools and test gear to build your own modular synth, then our kits of parts may be just what you need. As a minimum, you will need to be able to identify electronic components, recognise when they need to be correctly orientated, to be able to use a small soldering iron and finally have access to test equipment. Some modules do not require the use of test equipment but any requirement will be in the 'Setting and Trimming' notes.
The kits include all required electronics components as well as pots & switches. The PCB, connectors and knobs are not included but available from Soundtronics as an option. Our, front panel + matching back panel* really finish off the module in a truly professional way. If you purchase the PCB and components through Soundtronics, then we will also support you with technical assistance just in case you get into any build difficulties.
We only source quality components and we even include the more expensive turned pin IC sockets as we feel the product justifies the extra cost both for reliability and serviceability. Our optional 1/4" jack sockets are by Switchcraft, yes you can save money by buying cheaper sockets hence us offering it as an option because we recognise they are a significant cost. We have standardised on Cliff KM20 knobs for all of our modules but again, as it's an option you can choose different knobs to suit your own preference. Finally, all components are available individually should you not need to purchase the whole kit.
Note
On test, we experienced problems in getting the core ramp generator to oscillate. The YuSynth designer has two voltage regulators feeding the core part of the circuit +Vcc & -Vcc. These are intended to provide a degree of voltage stability to the core circuit and should give around +/-14.2V if using +/-15V regulators on a +/-15V supply. We actually found +13.63 and -14.7V. There are two precision resistors R49 and R50 used to create a 5V reference whioch can only happen if Vcc is 15V, not 13.63V as in our case. We decided to remove the two voltage regulators and bypass them on the basis that the synth power supply we use is very stable and any small fluctuation has an insignificant effect in comparison to the drift due to temperature changes. YuSynth has warned that bypassing the on-board regulators could require a number of resistor values to be changed. We found the circuit performance was not affected and the original resistor values were kept. Your choice as to whether to follow the same route as we did or stick to what is a proven design and looks to work in most cases.
Components Kit Contents (excludes PCB, sockets and knobs)
| Reference | Part No. | Description | Qty |
| R3,R4,R5 | 2000-161 | 100k 0.4W 0.1% 15ppm Precision Resistor | 3 |
| C8 | 2069-210 | 220pF 50V Film Polystyrene Axial Capacitor | 1 |
| U1 | 2230-031 | Voltage Regulator 78L12 +12V 100mA | 1 |
| U2 | 2230-041 | Voltage Regulator 79L12 -12V 100mA | 1 |
| U1 | 2230-047 | Voltage Regulator 78L15 +15V 100mA | 1 |
| U2 | 2230-048 | Voltage Regulator 79L15 -15V 100mA | 1 |
| R1,R2 | 7163-007 | 10R 0.25W 1% Metal Film Resistor | 2 |
| R39,R40,R42,R47 | 7163-051 | 1k 0.25W 1% Metal Film Resistor | 4 |
| R45 | 7163-055 | 1k5 0.25W 1% Metal Film Resistor | 1 |
| R38 | 7163-067 | 4k7 0.25W 1% Metal Film Resistor | 1 |
| R25 | 7163-069 | 5k6 0.25W 1% Metal Film Resistor | 1 |
| R36,R51 (12V version) | 7163-072 | 7k5 0.25W 1% Metal Film Resistor | 2 |
| R15,R17,R18,R21,R28,R37 | 7163-075 | 10k 0.25W 1% Metal Film Resistor | 6 |
| R36,R51 (15V version) | 7163-077 | 12k 0.25W 1% Metal Film Resistor | 2 |
| R46 | 7163-079 | 15k 0.25W 1% Metal Film Resistor | 1 |
| R11,R48 | 7163-083 | 22k 0.25W 1% Metal Film Resistor | 2 |
| R9,R20 | 7163-087 | 33k 0.25W 1% Metal Film Resistor | 2 |
| R10 | 7163-091 | 47k 0.25W 1% Metal Film Resistor | 1 |
| R14,R16,R22,R23,R24,R27, R29,R30,R31,R33,R35,R50 | 7163-099 | 100k 0.25W 1% Metal Film Resistor | 12 |
| R43,R44 | 7163-103 | 150k 0.25W 1% Metal Film Resistor | 2 |
| R34 | 7163-105 | 180k 0.25W 1% Metal Film Resistor | 1 |
| R41 | 7163-106 | 200k 0.25W 1% Metal Film Resistor | 1 |
| R26 | 7163-107 | 220k 0.25W 1% Metal Film Resistor | 1 |
| R7 | 7163-109 | 270k 0.25W 1% Metal Film Resistor | 1 |
| R8,R52 | 7163-114 | 470k 0.25W 1% Metal Film Resistor | 2 |
| R13,R19,R53 | 7163-122 | 1M 0.25W 1% Metal Film Resistor | 3 |
| R6 | 7163-123 | 3M3 0.25W 1% Metal Film Resistor | 1 |
| R32,R49 | 7163-142 | 50k 0.125W 0.5% Metal Film Resistor | 2 |
| R50 (12V version) | 7163-143 | 70k 0.125W 1% Metal Film Resistor | 1 |
| 7212-331 | Turned Pin 0.3 inch Dil IC Socket 8 Pin | 3 | |
| 7212-332 | Turned Pin 0.3 inch Dil IC Socket 14 Pin | 2 | |
| Q1 | 7212-406 | J111 JFET N-Channel Transistor | 1 |
| D1,D2,D3,D4 | 7212-480 | 1N4148 Signal Diode | 4 |
| D5,D6 | 7212-481 | 1N4148 3mV Matched Pairs | 1 |
| U6,U7 | 7212-544 | Quad Op-Amp BiFET TL074 | 2 |
| U3 | 7212-570 | Dual FET Input Op-Amp OPA2137PA | 1 |
| U5 | 7212-581 | Comparator LM311N Single | 1 |
| U4 | 7212-585 | AS394CN ( LM394 ) NPN Matched Transistor Pair 8-Pin Dip Note the pinout for the AS394CN is different, please see image above and the instructions on our AS394 product page here | 1 |
| C10 | 7212-730 | 10pF 2.5mm COG NPO Monolithic Radial Ceramic Capacitor | 1 |
| C9,C11,C12 | 7212-733 | 47pF 2.5mm COG NPO Monolithic Radial Ceramic Capacitor | 3 |
| C7 | 7212-734 | 100pF 2.5mm COG NPO Monolithic Radial Ceramic Capacitor | 1 |
| C3,C4,C5,C6,C13 | 7212-789 | 100n Polyester Capacitor 5% | 5 |
| T3 | 7212-857 | Multiturn Cermet Preset Top Adjust SIL 10k | 1 |
| T2 | 7212-858 | Multiturn Cermet Preset Top Adjust SIL 20k | 1 |
| T4 | 7212-859 | Multiturn Cermet Preset Top Adjust SIL 50k | 1 |
| T1 | 7212-861 | Multiturn Cermet Preset Top Adjust SIL 200k | 1 |
| C1,C2 | 7213-113 | Radial Electrolytic Capacitor 22uF 35V | 2 |
| R12 | 7214-000 | Linear PTC 1k Thermistor 3000ppm/C LT300014 5% | 1 |
| P1...P6 | 7300-240 | Synth Pot 16mm 22k Lin | 6 |