Semiconductors

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.

VacTec Vactrol. Opto-isolator with 4 leads. Used in Crate and others.

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

MOSFET BS170 N-Channel Transistor. Used in MOD® Kits.

Note - this is a fragile component! Use caution not to overheat or break leads.

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)