# Semiconductors

Diode - 1N34A Germanium
The 1N34A Germanium diode is an old standby in electronics. Widely used for detecting the rectifying efficiency or for switching on a radio, TV or stereo etc.
$1.75 Diode - Fast Recovery, 1A, 600V, 1N4937 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.$0.20
Diode - General purpose rectifier, 1A, 1N4005, 1N4006, 1N4007
A semiconductor device which passes current in the forward direction(from anode to cathode), and blocks current in the opposite direction.
Starting at $0.15 Diode - Hexfred, 16A, 600V High performance, ultrafast diodes. Improve efficiency, reduce noise, allow higher frequency operation.$2.92
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Originally: $4.00 Diode - Hexfred, ultrafast soft recovery, 16A, 1200V High performance, ultrafast diodes. Improve efficiency, reduce noise, allow higher frequency operation.$8.10
Diode - Hexfred, ultrafast soft recovery, 8A, 600V
High performance, ultrafast diodes. Improve efficiency, reduce noise, allow higher frequency operation.
$2.75 Diode - Silicon Rectifier, 3A, 400V, 1N5404 A semiconductor device which passes current in the forward direction(from anode to cathode), and blocks current in the opposite direction.$0.35
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.
$0.50 Diode - standard recovery rectifier, 3A, 1000V, 1N5408 1N5408 Diode. Lead mounted standard recovery rectifiers are designed for use in power supplies and other applications having need of a device with the following features: • High Current to Small Size • High Surge Current Capability • Low Forward Voltage Drop$0.38
Diode - Zener, 1W, 1N4741A, 1N4748A
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.
$0.15 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$1.50
Integrated Circuit - 4558, Dual Op-Amp
Dual Operational Amplifier. The 4558 integrated circuit is a dual high-gain operational amplifier internally compensated and constructed on a single silicon chip using an advanced epitaxial process. Combining the features of the NJM741 with the close parameter matching and tracking of a dual device on a monolithic chip results in unique performance characteristics. Excellent channel separation allows the use of the dual device in single NJM741 operational amplifier applications providing density. It is especially well suited for applications in differential-in, differential-out as well as in potentiometric amplifiers and where gain and phase matched channels are mandatory.
Features:
• Operating Voltage ( ±4V$±18V ) • High Voltage Gain ( 100dB typ. ) • High Input Resistance ( 5MΩ typ. ) • Bipolar Technology $0.75 Integrated Circuit - Fender®, Power Amp PC1188H PC 1188H Power Amp - Fender The PC1188H is a monolithic integrated circuit and a power amplifier designed for Hi-Fi audio sets. The PC1188H can provide 20W (typical) to 8 ohms at 1% T.H.D. and +/- 22V supply voltage. Features: • High output power • Low distortion • Wide frequency bandwidth • A muting function which eliminates pop on noise and the thermal and the over current protection circuit$9.50 Integrated Circuit - for Marshall, DG212CJ 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. $7.50 Integrated Circuit - LM386N-1 / NOPB 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.$1.25 Integrated Circuit - Marshall, TDA7293 amplifier 120V - 100W DMOS audio amplifier with mute/standby. The TDA7293 is a monolithic integrated circuit in Multiwatt15 package, intended for use as audio class AB amplifier in Hi-Fi field applications, such as home stereo, self powered loudspeakers and Topclass TV. Thanks to the wide voltage range and to the high output current capability it is able to supply the highest power into both 4-Ω and 8-Ω loads. $11.95 Integrated Circuit - NE5532, Low-Noise Dual Op-Amp This a high performance dual low noise operational amplifier. Compared to the standard dual operational amplifiers, such as the NJM1458, it shows better noise performance, improved output drive capability, and considerably higher small-signal and power bandwidths. it is compensated internally for voltage follower circuit. This makes the device especially suitable for application in high quality and professional audio equipment, instrumentation, control circuits, and telephone channel amplifiers Features: • Operating Voltage = ±3V$±22V • Small Signal Bandwidth = 10MHz typ. • Output Drive Capability = 600Ω,10Vrms typ. • Input Noise Voltage = 5nV/√Hz typ. • Power Bandwidth = 140kHz typ. • Slew Rate = 8V/µs typ. • Bipolar Technology$1.15
Integrated Circuit - TL074, Quad Op-Amp
Low noise JFET quad operational amplifier. Incorporates well matched, high-voltage JFET and bipolar transistors in a monolithic integrated circuit. Features high slew rates, low input bias and offset currents, and low offset voltage temperature coefficients.
Features:
• Wide common-mode and differential voltage range
• Low input bias and offset current
• Low noise en = 15 nV/HZ
• Output short-circuit protection
• High input impedance JFET input stage
• Low harmonic distortion: 0.01%
• Internal frequency compensation
• Latch up free operation
• High slew rate: 16 V/us (typical)
$1.15 LED - 3mm diameter, diffused lens Package of 5 Colors Available: Lens Diameter: 3 mm Overall Height: 5.4 mm Lens Type: Diffused Multiple color options available.$0.65
Op-Amp - Orange, Dual Discrete
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.
$55.00 Op-Amp - TL072, low-noise JFET dual operational amplifier The TL072is a high speed JFET input dual operational amplifier incorporating well matched, high voltage JFET and bipolar transistors in a monolithic integrated circuit. The device features high slew rates, low input bias and offset current, and low offset voltage temperature coefficient.$0.70
Operation Amplifier - with switch, M5201
The NJM2120 is a dual operational amplifier of 2-INPUT and 1-OUTPUT with analog switch. The NJM2120 can be used as analog switch under the condition of GV=0dB, as Switch + Amp in order that each gain (A or B) can be adjusted independently. Each amplifier of the NJM2120 has the same electrical characteristics as the NJM4558. The NJM2120 is suitable for audio, video, electrical musical instrument, etc.
$4.50 Optocoupler - Vactec, VTL5C1, Vactrol, New Old Stock New old stock Vactec VTL5C1 vactrols from Perkin Elmer Optoelectronics. These premium vactrols are a great choice for use in phasers, compressors, tremolos, and synth modules such as low-pass gates. They are also used in switching circuits in amplifiers. Limited quantities are available.$10.95
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