Synth & Eurorack Parts / DIY

The 2N4401 is a silicon general purpose NPN transistor in a TO-92 package. The 2N4401’s typical applications include signal processing, amplification, and switching.

The CD4049UB devices are inverting hex buffers, and feature logic-level conversion using only one supply voltage (VCC). The input-signal high level (VIH) can exceed the VCC supply voltage when these devices are used for logic level conversions. These devices are intended for use as CMOS to DTL or TTL converters and can drive directly two DTL or TTL loads. (VCC = 5 V, VOL ≤ 0.4 V, and IOL ≥ 3.3 mA.) Features:

• Inverting
• High Sink Current for Driving 2 TTL Loads
• High-to-Low Level Logic Conversion
• 100% Tested for Quiescent Current at 20 V
• Maximum Input Current of 1 µA at 18 V Over Full
• Package Temperature Range; 100 nA at 18 V and 25°C
• 5-V, 10-V, and 15-V Parametric Ratings

Applications

• CMOS to DTL or TTL Hex Converters
• CMOS Current Sink or Source Drivers
• CMOS High-to-Low Logic Level Converters

Audio taper, vertical mount, Alpha pots with a 6mm T18 knurled shaft. These 9mm pots are popular in DIY guitar pedals, synthesizers, and other projects. Mounting nut and washer included.

Panel mount LED lenses made of high quality polycarbonate. These flat cylindrical lenses provide a unique retro appearance with a small panel footprint and work well in any project using LED indicators. Features:

• 0.171” mounting hole
• For panel thicknesses of 0.031” to 0.094″
• Fresnel lens
• Flat cylindrical shape
• Fits standard 3mm LEDs

2N508 PNP germanium transistors. The 2N508 is a popular PNP for fuzz pedals and other effects. It can be found in modern classics such as the Sunface. This transistor is in a TO-5 package with long leads commonly found on germanium transistors.

LM3900 quad op amp in a 14-pin DIP package. These devices consist of four independent, high-gain frequency-compensated Norton operational amplifiers that were designed specifically to operate from a single supply over a wide range of voltages. Operation from split supplies is also possible. The low supply current drain is essentially independent of the magnitude of the supply voltage. These devices provide wide band- width and large output voltage swing. Features

• Wide Range of Supply Voltages, Single or Dual Supplies
• Wide Bandwidth
• Large Output Voltage Swing
• Output Short-Circuit Protection
• Internal Frequency Compensation
• Low Input Bias Current
• Designed to Be Interchangeable With National Semiconductor LM2900 and LM3900, Respectively

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.

LM1458 dual op amp in an 8-pin DIP package. The LM1458 is a general purpose dual operational amplifier. The two amplifiers share a common bias network and power supply leads. Otherwise, their operation is completely independent. Features

• No Frequency Compensation Required
• Short-Circuit Protection
• Wide Common-Mode and Differential Voltage Ranges
• Low-Power Consumption
• 8-Lead TO-99 and 8-Lead PDIP
• No Latch Up When Input Common Mode Range is Exceeded

Panel mount LED lenses made of high quality polycarbonate. These square lenses provide a clean semi-flush appearance with a small panel footprint and work well in any project using LED indicators. Features:

• 0.171” mounting hole
• For panel thicknesses of 0.031” to 0.125″
• Fresnel lens
• Low Profile
• Fits standard 3mm LEDs

Button-Head Socket Cap Screws - Class 10.9, ISO 7380 Coarse Thread. Used when a wider bearing surface or smoother, more finished appearance is desired.

The 2N5135 is a silicon NPN transistor in a TO-105 case. This transistor is a close match to the rare 2N5133 but with higher voltage ratings and is in a larger package. The hFE range is less wide than the 2N5133 with more values in the range found in the batches used on vintage Big Muff pedals. The lower hFE range also makes these a great option for silicon fuzz pedals.

22 AWG stranded hook-up wire on a 50 foot roll. This wire is smaller than our other wire options which makes it perfect for tight spaces like effects pedal and other small electronic projects. Strands are tinned individually. See photo for detail.

Simple and easy to use nut driving tool for the slotted nuts found on Qingpu jacks that are commonly used in Eurorack modules. The tool anchors into the sleeve of the jack ensuring no slippage when in use, protecting the faceplate from accidental damage. The two grip holes are cut to the size of M2.5 and M3 hex nuts and can be used in a pinch to tighten nuts of those sizes, or to hang your tool on a keyring! One side of the tool works with Mod "Top Brass" nuts and slotted W-QP-NUT-K nuts used on W-QP-518MA, W-QP-419GR, and W-QP-518MA-BM. The other side works with slotted W-QP-NUT-PJ-R nuts used on W-QP-PJ3410. Either side will work with Befaco Bananuts for 3.5mm jacks (W-BNUT-X). The nut driving tool is made of steel.

Switchcraft shouldered hex nuts for ⅜”-32 UNEF-2A threaded bushings. These nuts include a rubber grommet for use in sealed systems and also add a unique look to any build such as pedals or amplifiers. The large nut (W-SC-DRESS-1) is intended for panel or chassis thicknesses of 0.05” through 0.09”. The small nut (W-SC-DRESS-2) is intended for panel or chassis thicknesses of 0.095” through 0.125”. Rubber grommet included.

PCB for converting SMD SOT-23 transistors and FETs to through hole footprints. This adapter board fits SOT-23 packages. Solder the device to this PCB then attach wires or pin headers (sold seperately) to connect to through hole footprints on PCBs or breadboards. The white box on the PCB can be used to label the part with a marker. See image below for pinout.

2N2646 programmable unijunction transistor often referred to as a PUT. The 2N2646 can be found in many tremolo effects pedal projects and vintage classics such as the Vox Repeat Percussion.

OC139 NPN germanium transistors. The OC139 is a popular NPN for fuzz pedals and boost effects. This transistor is in a glass SO-2 package with long leads commonly found on germanium transistors. The NPN polarity allows for use with standard pedal power supplies. The dot indicates the collector lead. The OC139 can be found in the EarthQuaker Devices Bows germanium preamp.

The 2N2907 is a silicon planar epitaxial PNP transistor in a TO-18 metal case type. The 2N2907 is designed for use in high speed saturated switching and general purpose applications.

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.

Linear regulator with an adjustable voltage range from 1.2V to 37V. This regulator can supply 1.5A of current making it a great option for power supplies.

High-quality USA made knobs from Rogan Corp. These small 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 T18 knurled shafts.

• Height: 0.55 in.
• Diameter: 0.45 in.
• Fits T18 Knurled Shafts

For a D-shaft version of this knob, see P-K281P-W. A variety of different sizes are available from the PT Series. See the links below for the full selection of knurled shaft knobs from this series. P-K271PS-W 1PS Small Skirted Pointer P-K272P-W 2P Medium Pointer P-K272PS-W 2PS Medium Skirted Pointer

New old stock Soviet GT309E transistors manufactured in Ukraine. The GT309E is a germanium PNP transistor in a very low profile case. The case has a 0.29” diameter and is only 0.1” thick. These have very low leakage and work well in a variety of fuzz pedal builds.

Genuine Switchcraft ⅜” knurled nut commonly used on ¼” jacks. This nickel plated knurled nut has a ⅜”-32 threading and offers a clean look on builds using these nuts. The ⅜”-32 threading fits other hardware with matching threading such as CTS potentiometers.

2N797 NPN germanium transistors. The 2N797 is a popular NPN for fuzz pedals and other effects. The NPN polarity allows for use with standard pedal power supplies. The 2N797 is a fairly unique germanium transistor since it is in a TO-18 package.