Synth & Eurorack Parts / DIY

Our Synth & Eurorack Parts / DIY category is a curated list of items that are commonly found in synth/eurorack projects. The items and filters here do not represent our full lineup of parts. If you don't see what you are looking for, check out our main categories or send us a suggestion and we'll look into adding it.
P-QSFT353 Transistor - SFT353, Germanium, 18B4 case, PNP
SFT353 PNP germanium transistors. The SFT353 is a popular PNP for fuzz pedals and other effects. This transistor is in a 18B4 package with long leads commonly found on germanium transistors. This style of package can be found in Italian built Vox Tonebenders.
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P-KEY-CNT-X Key Contacts - Korg, Rubber, for Keyboards
For N364 and X5, 5 are required. for N264, 2 are needed. May be cut. Sold individually. These are also used in the Kurzweil MK (MARK)-Series of electronic pianos.
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R-VT29U-10K Trimmer - BI Technologies, Sealed, Cermet , Top Adjust, 10kΩ
High-quality BI Technologies Model 82 trimpots. These single-turn cermet trimmers are sealed ensuring a long life. They feature long leads (0.62”) making them a great choice for point to point builds in addition to PCB mounting. The simplistic design also looks great in vintage style builds.
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P-QNTE103 Transistor - NTE103, Germanium, TO-5 case, NPN
NTE103 NPN germanium transistors. The NTE103 is a popular NPN for fuzz pedals and other effects. This transistor is in a TO-5 package with long leads commonly found on germanium transistors. The NTE103 was used in the Texas Square Face made by Cesar Diaz, the famous amp tech who worked with Stevie Ray Vaughan and others. Early in his career, SRV had a broken Fuzz Face pedal and took it to Cesar Diaz to have him fix it. Diaz fixed and modified the pedal and this became the foundation of his famous version which he named the Texas Square Face. The Diaz pedals often came with socketed NTE103 and included a set of P-QNTE123 to experiment with the different sounds of the transistors.
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P-QNTE123 Transistor - NTE123, Silicon, TO-5 case, NPN
NTE123 NPN silicon transistors. The NTE123 is a popular NPN for fuzz pedals and other effects. This transistor is in a TO-5 package. The NTE123 was used in the Texas Square Face made by Cesar Diaz, the famous amp tech who worked with Stevie Ray Vaughan and others. Early in his career, SRV had a broken Fuzz Face pedal and took it to Cesar Diaz to have him fix it. Diaz fixed and modified the pedal and this became the foundation of his famous version which he named the Texas Square Face. The Diaz pedals often came socketed and included a set of NTE123 along with the standard pair of P-QNTE103 to experiment with the different sounds of the transistors.
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P-Q2N2646 Transistor - 2N2646 Programmable Unijunction
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.
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P-QBC148C Transistor - BC148C, Silicon, Lockfit case, NPN
BC148C NPN transistor in a rare Mullard Lockfit package. The BC148C is the equivalent of a BC108C but in the Lockfit package rather than a TO-18. The BC148C was used in a variety of audio and radio equipment and works well for fuzz and other effects.
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P-QOC41 Transistor - OC41, Germanium, SO-2 glass case, PNP
OC41 PNP germanium transistors. The OC41 is a popular PNP for fuzz pedals and boost effects. It can be found in vintage electronics and modern fuzz pedals. This transistor is in a black glass SO-2 package with long leads commonly found on germanium transistors.
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P-QOC46 Transistor - OC46, Germanium, SO-2 glass case, PNP
OC46 PNP germanium transistors. The OC46 is a popular PNP for fuzz pedals and boost effects. It can be found in vintage electronics and modern fuzz pedals. This transistor is in a black glass SO-2 package with long leads commonly found on germanium transistors.
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P-QSFT319 Transistor - SFT319, Germanium, 18B4 case, PNP
SFT319 PNP germanium transistors. The SFT319 is a popular PNP for fuzz pedals and other effects. This transistor is in a 18B4 package with long leads commonly found on germanium transistors. This style of package can be found in Italian built Vox Tonebenders.
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P-QTI377 Transistor - TI377, Germanium, SO-2 metal case, PNP
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.
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P-QAC132K Transistor - AC132K, Germanium, Heatsink TO-1 case, PNP
AC132K PNP germanium transistors. The AC132K is a popular PNP for fuzz pedals and other effects. This transistor is in a thick rectangular heat-sink package with long leads commonly found on germanium transistors.
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P-QBC238B Transistor - BC238B, Silicon, TO-92 case, NPN
BC238B NPN transistor in a TO-92 package. The BC238 is used in a variety of vintage pedals such as the Schaller Fuzz, a version of the Brian May treble boost,and later Jen / Tonebender fuzz pedals. The BC238B is a variant of the BC108B and works well in other classic fuzz pedals such as Fuzz Face and Big Muff builds.
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P-QOC42 Transistor - OC42, Germanium, SO-2 glass case, PNP
OC42 PNP germanium transistors. The OC42 is a popular PNP for fuzz pedals and boost effects. It can be found in vintage electronics and modern fuzz pedals. This transistor is in a black glass SO-2 package with long leads commonly found on germanium transistors.
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P-QOC83N Transistor - OC83N, Germanium, TO-1 case, PNP
OC83N PNP germanium transistors. The OC83N is a great PNP for fuzz pedals and boost effects. It is the TO-1 version of the OC83 which can be found in many fuzz pedals such as MK1.5 and MKII Tonebender clones. This transistor features long leads commonly found on germanium transistors.
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P-K655X Knob - Aluminum, Set Screw, Short Line, 0.495" Diameter
Colors Available:
New!:
Anodized aluminum knob with short indicator line and set screw. This slim, solid aluminum knob has a straight knurled grip with a diameter of 0.495”. It also features a counterbore which allows it to hide pot bushings for a clean look. Fits ¼” (6.35mm) pot shafts.
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P-K381-X Knob - Plastic, Set Screw, Skirted Pointer, 1.125" Diameter
Colors Available:
New!:
Large black plastic control knob with set screw and brass insert. This distinctive pointer knob is similar to the selector knobs used on original MiniMoog and Moog modular synths. It features a triangular pointer, a radial brushed metal top, and a line indicator. The large skirt has a diameter of 1.125 inches. Fits ¼” (6.35mm) pot shafts.
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R-CKIT Resistor Kit - ¼ Watt, Carbon Film, 5% tolerance, 5 of each value
Package of 80
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
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R-NOKIT Resistor Kit - ¼ Watt, Metal Film, 1% tolerance, 5 of each value
Package of 845
Metal Film resistors consist of a resistive element of an extremely thin layer of metal alloy vacuum deposited on a substrate. Precise and quiet.
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R-N Resistors - ¼ Watt, Metal Film, 1% tolerance
Package of 5
Metal Film resistors consist of a resistive element of an extremely thin layer of metal alloy vacuum deposited on a substrate. Precise and quiet. Package of 5. These resistors are perfect for pedal builders! 1/4 watt.
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R-GHKIT Resistor Kit - ⅛ Watt, Metal Film, 1% tolerance, 5 of each value
Package of 230
Metal Film resistors consist of a resistive element of an extremely thin layer of metal alloy vacuum deposited on a substrate. Precise and quiet.
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S-H534 ¼" Jack - Stereo, Panel Mount, Low Profile
Panel mount stereo jacks with a very low profile. These jacks have a smaller footprint than the Lumberg jacks that are popular for tight pedal builds. They are perfect for top mounted jack pedal builds and any other project where space is limited. Mounting nut and flat washer included.
  • M9*0.75 Bushing Thread
  • Stereo 3-Conductor (TRS)
  • Open Circuit (does not have switched terminal).
  • Includes nut and washer.
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W-QP-518MA-BLK-X 3.5mm Jack - Black Hardware, Eurorack, Mono, Switched Tip, PC Mount
Black PCB mounted 3.5mm mono jacks commonly found in DIY Eurorack projects. These jacks feature black hardware with a matching black nut. They also use a square bushing plate for added durability. Mounting nut is included.
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P-QLM386NX Audio Power Amplifier - LM386N-1 / 4, Low Voltage
LM386 Low Voltage Audio Power Amplifier The LM386 is a mono low voltage amplifier that can be used in a variety of applications. It can drive loads from 4 Ω to 32 Ω. The gain is internally set to 20 but it can be modified from 20 to 200 by placing a resistor and capacitor between pins 1 and 8. As this is an Op Amp it can be used in different configurations to fit in several applications. The internal gain setting resistor allows the LM386 to be used in a very low part count system. In addition a series resistor can be placed between pins 1 and 5 to modify the gain and frequency response for specific applications. These are found in many small audio amplifiers and even tiny pedal sized guitar amplifiers! There are tons of possibilities for this little Op Amp.
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