Synth & Eurorack Parts / DIY

High quality right angled 10-pin headers. Right angled headers are perfect for compact eurorack builds. The durable glass filled polyester shroud makes soldering these shrouded headers a simple task.

The Switchcraft Type 111X enclosed ¼” jack is a high quality mono jack. This jack has two solder lugs. One for the tip and one for the sleeve. These jacks have been widely used across the industry and can also be found in many popular 5U synthesizers. Includes nut and washer.

• Type 111X
• 0.276" bushing length (standard)
• Mates with standard ¼" plugs and is available with 0.25" inside diameter bushing.
• Mono 2-Conductor
• Includes nut and washer

See W-SC-112BX for stereo

Miniature Alpha pot for guitars. Audio taper.

The 2N2484 is a silicon planar epitaxial NPN transistor in a TO-18 metal case type. The 2N2484 is primarily intended for use in high performance, low level, low noise amplifier applications.

Dual wide-bandwidth LF353 opamps in an 8-pin DIP package. The LF353 offers a high input impedance and 3MHz bandwidth.
This LF353 device is a low-cost, high-speed, JFET input operational amplifier with very low input offset voltage. It requires low supply current yet maintains a large gain-bandwidth product and a fast slew rate. In addition, the matched high-voltage JFET input provides very low input bias and offset currents.

High-quality USA made knobs from Davies Molding. The skirted 1900 series knobs are made of solid phenolic and feature an indicator line on the skirt. These classic knobs have been used on a variety of equipment throughout the decades and are still popularly used on synthesizers today. The smaller 1910 knob was used on many early Serge paperface panels. Davies 1910 (Small)

• Height: 0.50 in.
• Diameter: 0.75 in.
• Fits ¼" shaft with set screw

Davies 1913 (Large)

• Height: 0.625 in.
• Diameter: 1.13 in.
• Fits ¼" shaft with set screw

Small plastic control knob with set screw and brass insert. This knob features a radial-brushed metal top, a fine straight-knurl grip, and a vertical pointer. Fits ¼” (6.35mm) pot shafts.

TI377 PNP germanium transistors from Texas Instruments. The TI377 is a great PNP for fuzz pedals and other effects. This transistor is in a metal SO-2 package with long leads commonly found on germanium transistors. This package with the gold leads visually matches the 2G308, 2G309, and 2G381 transistors found in Zonk and Tonebender MKI fuzz pedals.

Low profile Lumberg panel mount barrel jack with solder lugs. This high quality jack is the perfect size for smaller builds where additional space is necessary. The Lumberg low profile DC jack is also great for builds where aesthetics are a priority. For use with barrel plugs with a 5.5mm external diameter and 2.1mm internal diameter. Mounting nut included.

Mod® "Top Brass" nuts are the easiest way to upgrade your Eurorack module or other 3.5 mm application to a more regal look - we call it "Top Brass". Designed with the same outer dimensions as Qingpu knurled nuts, these round brass nuts will fit any module using Qingpu or other similar metal-bushing jacks without covering up the jack labels. As their name implies, the Mod® "Top Brass" nuts are made out of pure brass, and while they look incredible on their own, their appearance also pairs extremely well with the immersion gold used on Make Noise and other similar modules. Rather than being knurled, Top Brass nuts have a smooth outer edge for a clean look. The nuts are slotted and will work with all existing nut drivers intended for use with the knurled Qingpu-style nuts. "Top Brass" nuts use M6x0.5 threading which matches the bushing on the ubiquitous Qingpu jacks and many of their copies.

The FatKeys™ SSI2131 Voltage Controlled Oscillator provides the core VCO function with buffered triangle, sawtooth, and variable-width pulse waveform outputs over a ten-octave range. The device offers unparalleled temperature stability, exponentiality, waveform integrity, and ease of use while requiring an absolute minimum of external components. The SSI2131 is a new-generation voltage controlled oscillator for high-performance electronic musical instruments and other systems requiring accurate audio-band waveform generation. The device offers unprecedented levels of temperature stability, exponentiality, waveform integrity, and ease of use.

The AS3080ED is Alfa’s version of the CA3080 IC in an SOIC package. The AS3080ED is a gain block which is the operational-transconductance-amplifier (OTA). The AS3080ED has differential input and a single-ended, push-pull, class A output. Amplifier bias input may be used either for gating or for linear gain control. High output impedance and transconductance (gM) is directly proportional to the amplifier bias current (IABC). Linearizing diodes are provided at the inputs to reduce distortion and allow higher input levels. The result is a 10-dB signal-to-noise improvement referenced to 0.5 percent THD.
The AS3080ED is notable for it’s high slew rate (50V/µs), which makes it especially useful for multiplexer and fast unity-gain voltage followers.

Korg Tact switch under knob P8012S. SPST momentary, 0.25in. width.

High-quality USA made knobs from Rogan Corp. These large, puck-shaped, skirted pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm D-shafts.

• Height: 0.45 in.
• Diameter: 0.84 in
• Fits 6mm D Shafts
• Indicator on round side of D-shaft

A variety of different sizes are available from the PT Series.

Genuine Carling DPDT 3 Position Mini Toggle, Round Bat, Solder Lugs

• DPDT ( Double Pole/ Double Throw) switch
• 0.354" bushing length
• 0.409” bat length
• ¼" chassis hole diameter
• Solder terminals

Reverse audio taper Alpha 16mm pots with a solid shaft and right angle PCB mount terminals. 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”)
• Lead Depth from Panel: 10.7 mm + 5 mm (0.421” + 0.197”)
• Lead Distance from shaft center: 16 mm (0.630”)
• Lead Thickness: 0.5 mm (0.020”)
• Shaft Diameter: 6.35 mm (0.25”)

The SSI2140 is a new-generation voltage controlled filter that provides four highly-configurable variable transconductance cells for a wide variety of pole and mode combinations, and adds significant new features.

Stripboard made with a phenolic substrate. Phenolic boards are found in many vintage electronics before the use of fiberglass became common. This stripboard features a 0.15” vintage spacing. This spacing is great for vintage-style builds and more easily accommodates axial capacitors and other larger sized vintage parts like resistors and transistors. The board has a 20x10 grid (10 strips) and easily fits into 1590BB style enclosures and larger vintage-style fuzz enclosures. Each strip is gold coated making soldering easier than most protoboards and also ensures a long shelf life. Features:

• High-quality 1.6mm phenolic circuit board
• Gold coated strips
• 20 x 10 holes (10 strips)
• 3.04” x 1.55”

Linear taper, vertical mount, Alpha pots with a 6.35mm shaft diameter featuring 11 detents across the rotation. The 11 detent versions are useful for builds where 1-10 settings are commonly used or if the pot is used as a rotary switch along with a microcontroller. These 9mm pots are popular in DIY guitar pedals, synthesizers, and other projects. Mounting nut and washer included. See R-VAV-A100K-11DET for an audio taper version.

LM311 single comparator IC in an 8-pin DIP package. The LM311 device is a single high-speed voltage comparator. These devices are designed to operate from a wide range of power supply voltages, including ±15-V supplies for operational amplifiers and 5-V supplies for logic systems. The output levels are compatible with most TTL and MOS circuits. These comparators are capable of driving lamps or relays and switching voltages up to 50 V at 50 mA. All inputs and outputs can be isolated from system ground. The outputs can drive loads referenced to ground, VCC+ or VCC−. Offset balancing and strobe capabilities are available, and the outputs can be wire-OR connected.

1N4748A 22V 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.

2N5458 N-channel JFET in a TO-92 package. The 2N5458 is an N−channel junction field effect transistors, depletion mode (Type A), designed for audio and switching applications. Features

• N−Channel for Higher Gain
• Drain and Source Interchangeable
• High AC Input Impedance
• High DC Input Resistance
• Low Transfer and Input Capacitance
• Low Cross−Modulation and Intermodulation Distortion

A threaded fastener made from austenitic stainless steels. It contains chromium creating an invisible surface film that resists oxidation making the metal corrosion resistant. If the surface layer is damaged, it rebuilds itself in the presence of oxygen.

NE5532 dual op amp in an 8-pin DIP package. The NE5532 device is a high-performance operational amplifier combining excellent DC and AC characteristics. They feature very low noise, high output-drive capability, high unity-gain and maximum-output-swing bandwidths, low distortion, high slew rate, input-protection diodes, and output short-circuit protection. These operational amplifiers are compensated internally for unity-gain operation. These devices have specified maximum limits for equivalent input noise voltage. Features

• Equivalent Input Noise Voltage: 5 nV/√Hz Typ at 1 kHz
• Unity-Gain Bandwidth: 10 MHz Typ
• Common-Mode Rejection Ratio: 100 dB Typ
• High DC Voltage Gain: 100 V/mV Typ
• Peak-to-Peak Output Voltage Swing 26 V Typ With VCC± = ±15 V and RL = 600 Ω
• High Slew Rate: 9 V/μs Typ