Synth & Eurorack Parts / DIY

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”)

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:

• ¼” mounting hole
• For panel thicknesses of 1/16” to ⅛”
• Fresnel lens
• Flat cylindrical shape
• Fits standard 5mm LEDs

The 2N4125 is a general purpose silicon NPN transistor in a TO-92 case. The 2N4125 is primarily intended for general purpose amplification. It is a popular choice for silicon fuzz pedals due to its low hFE specifications. It has also been used in a variety of classic pedals such as the Phase 90.

Rubber caps / switch tips for mini toggle switches in a variety of colors. These are made for standard sized toggle bats.

Phillips panhead machine screw, M3 metric, zinc. Designed to go through a hole or nut that is pre-tapped to form a mating thread for the screw. Phillips drive is the most common drive used and is designed to "camout" when the screw reaches optimum tightness, thus preventing damage to the screw head. See S-HS-M3-6-X for colored 6mm M3 screws.

100kΩ dual-gang 16mm potentiometers with a solid shaft and a linear taper. These pots have 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”)

2N169 NPN germanium transistors in an oval package. The oval package is sometimes referred to as a top hat package. The 2N169 is a popular NPN for fuzz pedals and other effects. The NPN polarity allows for use with standard pedal power supplies.

High brightness 5mm LED. Great for use in pedal and amp builds as well as other applications where a bold, bright, indicator is needed. Multiple colors available.

• 5mm size
• Water clear
• High brightness
• Multiple colors available
• Package of 5

2N4061 PNP transistors. This is a silicon PNP transistor in a TO-92 package. The 2N4061 has been used in a variety of effects pedals and is most notably used in the Zonk Machine II.

Audio taper 16mm potentiometers with a T18 knurled shaft. These pots have 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”)

Lens Diameter: 3 mm Overall Height: 5.4 mm Lens Type: Diffused Multiple color options available.

The FatKeys™ SSI2130 Voltage Controlled Oscillator provides beautiful triangle, sawtooth, pulse, and square waveforms with unprecedented temperature stability; and adds an on-chip mixer, low distortion sine wave generator, through-zero FM/PM capability and more in an ultra-compact PCB footprint.

Solid tinned copper bus wire. 105°C temperature rating, 600V.

OPA2134 SoundPlus™ Audio dual op-amp with low distortion, low noise and precision. The OPA2134 are ultra-low distortion, low-noise operational amplifiers fully specified for audio applications. A true FET input stage is incorporated to provide superior sound quality and speed for exceptional audio performance. This, in combination with high output drive capability and excellent DC performance, allows for use in a wide variety of demanding applications. In addition, the OPA2134 has a wide output swing, to within 1 V of the rails, allowing increased headroom and making it ideal for use in any audio circuit. The OPA2134 SoundPlus™ audio operational amplifiers are easy to use and free from phase-inversion and the overload problems often found in common FET-input operational amplifiers. They can be operated from ±2.5-V to ±18-V power supplies.

VTL5C1 vactrols for use in amplifiers, effect pedals, synthesizers and more. The VTL5C1 was commonly used for channel switching circuits in amps made by Crate and others.

1N4742A 12V 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.

NPN Darlington transistor (TO-92 package) - designed for applications requiring extremely high current gain at collector currents to 1.0A.

• Max collector to emitter voltage = 30 V
• Max collector to base voltage = 30 V
• Max emitter to base voltage = 10 V
• Max collector current = 1.2 A (continuous)

Carling, SPDT mini toggle with short actuator, 3 positions, ¼" mounting hole diameter, 0.354" bushing length.

• 0.354" bushing length
• 3-Position On/Off/On
• ¼" mounting hole diameter
• Single pole/Double throw (SPDT)
• Solder lugs

High-quality USA made knobs from Rogan Corp. These medium, 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: 0.84 in.
• Diameter: 0.62 in.
• Fits 6mm D Shafts
• Indicator on round side of D-shaft

For a T18 knurled version of this knob, see P-K272PS-W. A variety of different sizes are available from the PT Series.

Carling mini-toggle switch, 3PDT, ideal for stomp boxes, phase switching, coil-tapping, series/parallel pickup switching in guitars.

• 0.354" bushing length
• 1/4" mounting hole diameter
• On-On Three pole/double throw (3PDT)

PT2399 echo/delay chip used in many DIY and commercial pedals. The PT2399 is in a DIP 16 package. Minimal external components are required for use and delay time is set with resistance.

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 D-shafts.

• Height: 0.55 in.
• Diameter: 0.45 in.
• Fits 6mm D Shafts
• Indicator on round side of D-shaft

For a T18 knurled version of this knob, see P-K271P-W. A variety of different sizes are available from the PT Series.

2N1308 NPN germanium transistors. The 2N1308 is a popular NPN for fuzz pedals and other effects. This transistor is in a TO-39 package.

Linear 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.