Ray Wilson authored this content while he was actively running MFOS as the founder and resident genius. We retain the content because it reflects a valuable point of view representing that time and place.
Do you work with oscilloscopes and multimeters in your day to day work (or hobby or vocation you're passionate about)? Do you have to find and fix bugs in electronic circuitry on a fairly regular basis? Have you finished large and challenging electronic projects in the past?
Please don't misunderstand all of this up-front warning. I don't know of a more fun and challenging hobby than synth-diy but I don't want to sell you a bunch of PC boards and then have you be disappointed when you realize that a lot of work is involved or feel that I didn't cover the significant challenges involved clearly enough up front.
Another point I need to emphasize (notice the boldface) is that I am not able to be a trouble shooting resource for you. But I'm buying all these boards... whaaaaat? Again, letting you know up front. As much as I wish I could, there are just not enough hours in the day. So again I'm letting you know up front that you need to possess advanced electronics equipment skills and excellent trouble shooting skills to succeed with any large analog modular synthesizer project.
This is a totally legitimate question I was recently asked by a perspective buyer. The only way you can answer it is to go to YouTube and search for MFOS Modular. You'll find lots of YouTubes in which builders show what their MFOS modular synths can do. You be the judge. Of course I like how MFOS gear sounds but they're my babies and I'm very biased so check out some YouTubes before you make a decision to purchase. Building your own synth is a lot of work - period. Make sure you build the one that's right for you.
The following are some of the significant challenges you have to accomplish before you ever hear a sound.
Since I still get emails asking me questions that are completely answered above...
Please read the above before buying. You'll be glad you did.
Still interested? Read on...
Note: These are only the more difficult to find components. You must order the bulk of the components after reading each project's Parts List.
Component | Quantity |
MPF102 – N-Channel JFET Transistor | 2 |
PN4391 – N-Channel JFET Transistor | 1 |
Matched 2N3904 NPN Transistor Pair & Tempco | 1 |
.005uF Polystyrene Capacitor | 1 |
2N5172 (NPN Transistor Selected for Noise) | 1 |
LF444CN – JFET Input Quad Op Amp IC | 1 |
LM13600 – Dual Transconductance Op Amp IC | 5 |
2N5457 – N-Channel JFET | 2 |
Note: These are only the more difficult to find components. You must order the bulk of the components after reading each project's Parts List.
Component | Quantity |
1N5231B – 5.1V Zener Diode | 2 |
MPF102 – N-Channel JFET Transistor | 2 |
PN4391 – N-Channel JFET Transistor | 3 |
Matched 2N3904 NPN Transistor Pair & Tempco | 3 |
.005uF Polystyrene Capacitor | 3 |
2N5172 (NPN Transistor Selected for Noise) | 1 |
LM386N – 1W Integrated Amplifier IC | 2 |
LF444CN – JFET Input Quad Op Amp IC | 1 |
LM13600 – Dual Transconductance Op Amp IC | 8 |
2N5457 – N-Channel JFET | 3 |
Note: These are only the more difficult to find components. You must order the bulk of the components after reading each project's Parts List.
Component | Quantity |
1N5231B – 5.1V Zener Diode | 2 |
NZ5V1B – 5.1V Zener Diode | 2 |
BZX55C10 - 10V Zener Diode | 1 |
MPF102 – N-Channel JFET Transistor | 2 |
PN4391 – N-Channel JFET Transistor | 3 |
Matched 2N3904 NPN Transistor Pair & Tempco | 3 |
.01uF Polystyrene Capacitor | 1 |
.005uF Polystyrene Capacitor | 3 |
2N5172 (NPN Transistor Selected for Noise) | 1 |
LM386N – 1W Integrated Amplifier IC | 2 |
LF444CN – JFET Input Quad Op Amp IC | 2 |
LM13600 – Dual Transconductance Op Amp IC | 13 |
AD633AN – Analog Multiplier IC | 1 |
2N5457 – N-Channel JFET | 8 |
Note: These are only the more difficult to find components. You must order the bulk of the components after reading each project's Parts List.
Component | Quantity |
1N5231B – 5.1V Zener Diode | 2 |
NZ5V1B – 5.1V Zener Diode | 2 |
BZX55C10 - 10V Zener Diode | 1 |
BZX55B9V1 - 5.1V Zener Diode | 1 |
MPF102 – N-Channel JFET Transistor | 2 |
PN4391 – N-Channel JFET Transistor | 3 |
Matched 2N3904 NPN Transistor Pair & Tempco | 4 |
.01uF Polystyrene Capacitor | 1 |
.005uF Polystyrene Capacitor | 3 |
2N5172 (NPN Transistor Selected for Noise) | 1 |
LM386N – 1W Integrated Amplifier IC | 2 |
2N3906 PNP Transistor | 8 |
200K 0.1% Precision Metal Film Resistor | 17 |
100K 0.1% Precision Metal Film Resistor | 10 |
LF444CN – JFET Input Quad Op Amp IC | 2 |
LM13600 – Dual Transconductance Op Amp IC | 19 |
AD633AN – Analog Multiplier IC | 1 |
2N5457 – N-Channel JFET | 8 |