Synth & Eurorack Parts / DIY

A semiconductor device which passes current in the forward direction(from anode to cathode), and blocks current in the opposite direction.

High-quality USA made knobs from Rogan Corp. These small knobs feature a metal insert, spun aluminum inlay, and a skirt with an infilled arrow indicator. The RB-67 Series from Rogan is popularly used on Buchla 200 Series modular synthesizers and can be found on many contemporary eurorack synthesizers..

• Height: 0.66 in.
• Diameter: 0.90 in
• Fits ¼" shaft with set screw

A variety of sizes and colors are available from the RB-67 Series. See the links below for the full selection of knobs from this series. P-K770-X Small P-K770S-X Small Skirted P-K771S-X Medium Skirted P-K772S-B Large Skirted

Carbon Film resistors are made by vacuum depositing a thin carbon film on a ceramic form. A good choice for applications which require a steady, low power drop. Package of 5. These resistors are perfect for pedal builders!

• 1/4 watt
• ± 5% tolerance
• EIA color coded
• .24" long x .08" diameter
• Package of 5

Reverse audio taper 16mm solid shaft potentiometers with solder lug terminals. These pots are great for any project. The smaller size is useful for builds with limited panel space such as guitar pedals, synthesizer modules, and adding modifications to equipment. Washer and nut included.

• Threading: M7 x 0.75
• Distance between terminals: 5 mm (0.197”)
• Bushing Length: 6.5mm (0.256")
• Shaft Diameter: 6.35mm ( 0.250")
• Taper: Reverse Audio (Anti-Log)

A very high performance single-channel VCA for the most demanding applications, the ProCircuit™ SSI2161 offers industry-leading lowest-noise, and a mode control to optimize noise vs. distortion performance. All at low-cost and in a 10-lead SSOP package. The SSI2161 is a versatile VCA building block for high-performance audio applications. A single channel provides voltage control of current-mode inputs and outputs for a gain range from +20dB to –100dB, with control provided by a ground-referenced –33mV/dB constant. The device offers considerable flexibility for a wide range of design goals and applications. A unique mode control allows selection of Class A, Class AB, or in-between using a single resistor. In addition, improved current handling allows use of lower value input resistors for reduced output noise without loss of headroom.

Carbon Film resistors are made by vacuum depositing a thin carbon film on a ceramic form. A good choice for applications which require a steady, low power drop. Package of 5. These resistors are perfect for pedal builders! 1/4 watt ± 5% tolerance EIA color coded .24" long x .08" diameter Resistance Values (5 each) 100 470 1K 2.7K 4.7K 8.2K 10K 22K 33K 47K 100K 150K 220K 470K 560K 1M

Linear taper, vertical mount, dual gang Alpha pots with a 6.35mm shaft diameter. Dual gang pots are useful for stereo controls and other circuits requiring two separate pots moving in tandem. These 9mm pots are popular in DIY guitar pedals, synthesizers, and other projects. Mounting nut and washer included. See R-VAV-A100K-DUAL for an audio taper version.

LM358H dual op amp in an 8-pin TO-99 package. The LM358H series consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. Application areas include transducer amplifiers, dc gain blocks and all the conventional op-amp circuits which now can be more easily implemented in single power supply systems.

Ceramic disc capacitor, 680 pF (.00068µF) rated for up to 50 V.
Non linear temperature coefficient of capacitance

High-quality USA made knobs from Davies Molding. The large skirted 1919 pointer knob is made of solid phenolic and features an infilled indicator line. The pointer has an overall length of 1.25” and the skirt’s diameter is 1.13”. This knob shares design elements of the Davies 19xx knobs allowing for a uniform look while using a variety of knob shapes and styles.

• Height: 0.625 in
• Length: 1.25 in.
• Fits ¼" shaft with set screw

Ideal for precision assembly work with close tolerances and applications needing a well tooled appearance.

Polyester Film Capacitor used in MOD® Pedal Kits. Rated at 0.047µF 50V. Tolerance: 10%. Operating temperature: -40 C to +85 C

High-quality USA made knobs from Rogan Corp. These phenolic knobs feature a brushed aluminum inlay, a small skirt and an infilled indicator line. 155 Series knobs can be found on classic gear from Sunn, Music Man, Gibson and others. Fits ¼" shaft potentiometers.

• Height: 0.62 in.
• Diameter: 0.84 in.
• Fits ¼" shaft with set screw

A variety of different knobs are available from the 155 Series. See the links below for the full selection. P-K155-2 0-10 Witch Hat P-K155-3 Large Witch Hat w/ Arrow

Alpha Mini Pots with solid shaft and short PC mount terminals.

• Threading: M7 x 0.75
• Distance between terminals: 5 mm (0.197”)
• Lead Depth from Panel: 3.8 mm (0.150”)
• Lead Distance from shaft center: 12.5 mm + 3.5 mm (0.492” + 0.138”)
• Lead Thickness: 0.5 mm (0.020”)

The 2N708 is a silicon NPN transistor in a TO-18 metal case type. The 2N708 is primarily intended for use in high speed switching and VHF amplification applications.

Carling, SPDT mini toggle, 2 positions, ¼" mounting hole diameter, 0.354" bushing length.

1N4741A 11V zener diode in a DO-41 package. A semiconductor device that, above a certain reverse voltage(the zener value) has a sudden rise in current. If forward biased, the diode is an ordinary rectifier. When reverse biased, it exhibits a sharp break in its current-voltage graph. Voltage across the diode remains essentially constant for any further increase of reverse current.

High quality banana jacks with tinned brass contacts and strong nylon housings. These jacks come in a wide variety of colors and work well with any 4mm banana plug. Cinch Johnson banana jacks are used in test equipment, audio equipment, as well as modular synthesizers such as DIY Buchla, Serge, and others. Features:

• Formed brass contacts
• Bright tin finish
• Durable nylon 6/6 body
• Nickel plated nut
• 0.010Ω maximum contact resistance
• Keyed mounting with two flatted sides

J201 N-Channel JFET in a TO-92 package made by Siliconix. The J201 is designed primarily for low level audio and general purpose applications with high impedance signal sources.

• Max drain to gate voltage = 40 V
• Max gate to source voltage = -40 V
• Max forward gate current = 50 mA

2N1309 PNP germanium transistors. The 2N1309 is a popular PNP for fuzz pedals and other effects. This transistor is in a TO-5 package with long leads commonly found on germanium transistors.

½" panel mount with solder lugs. Round plastic with normally closed switch. For barrel plugs with a 5.5mm external diameter and 2.1mm internal diameter.

The BC183 is a general purpose NPN transistor in a TO-92 case. The BC183 is commonly used in fuzz pedals and has a reputation as a warm sounding silicon transistor for fuzz. The BC183 is available in three different gain ranges: BC183A, BC183B, and BC183C. Type hfe (IC=2mA, VCE=5V, f=1KHz) BC183A 125-260 BC183B 240-500 BC183C 450-900

Reverse audio taper (antilog), right angle, Alpha pots with a 6.35mm shaft diameter. These 9mm pots are poplar in DIY guitar pedals, synthesizers, and other projects. Mounting nut and washer included.

LF347 quad op amp in a 14-pin DIP package. The LF347 is a low cost, high speed quad JFET input operational amplifier with an internally trimmed input offset voltage ( BI-FET II™ technology). The device requires a low supply current and yet maintains a large gain bandwidth product and a fast slew rate. In addition, well matched high voltage JFET input devices provide very low input bias and offset currents. The LF347 is pin compatible with the standard LM348. This feature allows designers to immediately upgrade the overall performance of existing LF348 and LM324 designs. The LF347 may be used in applications such as high speed integrators, fast D/A converters, sample-and-hold circuits and many other circuits requiring low input offset voltage, low input bias current, high input impedance, high slew rate and wide bandwidth.