Semiconductors

Diode - Hexfred, 16A, 600V, ultrafast
High performance, ultrafast diodes. Improve efficiency, reduce noise, allow higher frequency operation.
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Transistor - TIP41C, NPN Epitaxial Transistor
Transistor TIP41C, TO-220 Case. NPN Epitaxial Silicon Transistor Complementary to TIP42 (P-QTIP42C) Max ratings:
  • Collector-Base voltage = 100V
  • Collector-Emitter Voltage = 100V
  • Emitter-Base Voltage = 5V
  • Collector current (DC) = 6A
  • Collector current (Pulse) = 10A
  • Base current = 2A
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Integrated Circuit - SSI2161, Single VCA, Sound Semiconductor
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.
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Transistor - Peavey, SDS 7204, 300V, 10mA
SDS 7204, 300V, 10 mA, Case-30.
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Analog Switch IC - DG212CJ, for Marshall, Quad SPST, 16-Pin DIP
DG212CJ, used in certain Marshall amplifiers. The DG212 are low cost quad single-pole single-throw analog switches for use in general purpose switching applications in communication, instrumentation and process control.
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Diode Thyristor - Peavey, SBS 14 Bidirectional, 8V, TO-92 Case
Designed for full-wave triggering in Triac phase control circuits, half-wave SCR triggering application and as voltage level detectors. Used in most Peavey linear power amplifier designs through 2000 including CS/M/DECA series power amps, IPA300, and all models using 402/602/304S/204S power modules.
  • Low Switching Voltage — 8 Volts Typical
  • Uniform Characteristics in Each Direction
  • Low On-State Voltage — 1.7 Volts Maximum
  • Low Off-State Current — 0.1 mA Maximum
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Transistor - MJ15015, NPN, Complementary High-Power
Transistor MJ15015, TO-3 Case, NPN
PowerBase complementary transistors designed for high power audio, stepping motor and other linear applications. These devices can also be used in power switching circuits such as relay or solenoid drivers, dc–to–dc converters, inverters, or for inductive loads requiring higher safe operating areas.
Safe Operating Area - Rated to 60V
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Op-Amp - Orange, Dual Discrete, Low-Noise, 8-Pin DIP
The Dual Discrete op-amp is specially designed for audio and is among the most musical sounding dual discrete op-amps out there. It is available in DIP 8 format and can be used in any CD player, DAC, or preamplifier that currently runs DIP 8 based IC dual op-amp types. The overall soundstage and transient detail will be greatly improved when used in pretty much all audio equipment that it can physically be fitted to. It has a very low noise Jfet front end so it can run with input impedances above 1M Ohms if needed. It can replace the following, provided the equipment it’s being used in has 22mm of height clearance and 5mm side clearance (per side).
  • OPA2604
  • OPA2134
  • TL072
  • NE5532
  • LM4562
  • OP275
  • OP285

Please check that the PSU can supply the extra current needed, especially if replacing more than one existing IC op-amp with our op-amp as with all discrete types, they do draw more current.
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Transistor - MJ15023, PNP, Power Transistor
Transistor MJ15023, TO-3 Case, PNP
PowerBase power transistors designed for high power audio, disk head positioners and other linear applications.
Features
  • High Safe Operating Area (100% Tested) −2 A @ 80 V
  • High DC Current Gain − hFE = 15 (Min) @ IC = 8 Adc
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Optocoupler - Xvive, Vactrol, VTL5C Series
High quality vactrols from Xvive. The Xvive vactrols are clones of the original Excelitas / Perkins-Elmer vactrols used in man effects pedals, synthesizers, compressors and other equipment. These vactrols feature a thick epoxy sealed casing. The VTL5C3 and VTL5C3/2 both have a steep slope, good dynamic range, a very low temperature coefficient of resistance, and a small light history memory.
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Integrated Circuit - SN74LS175, Quadruple D-Type Flip-Flops, 16-pin DIP
This quad flip flop is a part used in our Relay True Bypass Switching Part 2: Momentary and Soft Touch Switches article. To read the full article and learn about a circuit for relay switching in stomp box effects, please see the following link. https://www.amplifiedparts.com/tech-articles/relay-true-bypass-switching-2 These monolithic, positive-edge-triggered flip-flops utilize TTL circuitry to implement D-type flip-flop logic. All have a direct clear input, and the '175, 'LS175, and 'S175 feature complementary outputs from each flip-flop. Information at the D inputs meeting the setup time requirements is transferred to the Q outputs on the positive-going edge of the clock pulse. Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the positive-going pulse.
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Diode - Hexfred, ultrafast soft recovery, 16A, 1200V
High performance, ultrafast diodes. Improve efficiency, reduce noise, allow higher frequency operation.
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Integrated Circuit - SSI2131, VCO, Sound Semiconductor
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.
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Transistor - Peavey, PNP 180V Output, SJ-73180, 180V, 3A
SJ-73180 (MJ21193), PNP output, 180V, 3A, TO-3 Case.
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Transistor - Fender®, A1837, amplifier application
A1837 Transistor - Fender. Power amplifier applications and Driver Stage Amplifier Applications.
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Integrated Circuit - ATtiny45, SN74LS175, 8-bit AVR Microcontroller, 8-pin DIP
This microcontroller is a part used in our Relay True Bypass Switching Part 3: Microcontrollers and Current Savings article. To read the full article and learn about a circuit for relay switching in stomp box effects, please see the following link. https://www.amplifiedparts.com/tech-articles/relay-true-bypass-switching-3 The high-performance, low-power Microchip 8-bit AVR RISC-based microcontroller combines 4KB ISP flash memory, 256-Byte EEPROM, 256B SRAM, 6 general purpose I/O lines, 32 general purpose working registers, one 8-bit timer/counter with compare modes, one 8-bit high speed timer/counter, USI, internal and external Interrupts, 4-channel 10-bit A/D converter, programmable watchdog timer with internal oscillator, three software selectable power saving modes, and debugWIRE for on-chip debugging.
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Transistor - Peavey, PNP Darlington, SJE 2153, 80V, 3A
SJE 2153 (TIP107), PNP Darlington, 80V, 3A, TO-3 Case.
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Transistor - Peavey, NPN 140V Driver, SJ-81180, 180V, 1A
SJ-81180, NPN driver, 180V, 1A, TO-3 Case.
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Transistor - MJ15025, TO-3 case, power
Transistor MJ15025, TO-3 Case The MJ15025 is a power transistor designed for high-power audio, disk head positioners, and other linear applications Features:
  • High Safe Operating Area: -2A @ 80 V
  • High DC Current Gain hFE = 15 (Min) @ IC = 8 Adc
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Diode - small signal fast switching, 1N4148A
A semiconductor device which passes current in the forward direction(from anode to cathode), and blocks current in the opposite direction. For extreme fast switches.
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Switch - Vibrato LDR, for Fender® Amps
Optocoupler. Vibrato LDR for Fender Amps. Fix the dead LDR-style tremolo on your vintage Fender amps as well as others.
  • Non-polarized optical side is indicated by silver dot and slightly longer leads
  • Resistive side is indicated only by slightly shorter leads
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Transistor - 2N5088, Bipolar, General Purpose
2N5088 NPN Bipolar Junction Transistor in TO-92 package
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Diode - Zener, 5 Watt, ±5% tolerance
5W zener diodes that are great for use in tube amps. These are commonly used to drop B+ voltages for tube modification compatibility or to create low power modes for the amp. A zener is 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.
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Transistor - JFET N-Ch Transistor Lo Freq / Lo Noise, PF5102
PF5102 N-Channel Switch (TO-92 package) - designed for low level analog switching, sample and hold circuits and chopper stabilized amplifiers.
  • Max drain to gate voltage = 40 V
  • Max gate to source voltage = -40 V
  • Max forward gate current = 50 m
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