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Velleman K4102 User Manual

Velleman K4102
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K4102
ILLUSTRATED ASSEMBLY MANUAL H4102IP-1
Total solder points: 79
Difficulty level: beginner 1 2 3 4 5 advanced
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GUITAR PREAMPLIFIER WITH HEADPHONE OUTPUT
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Velleman K4102 Specifications

General IconGeneral
Frequency Response20Hz - 20kHz
TypeStereo amplifier
Load Impedance4 ohms
Power Supply12V DC
Output Power2 x 50W music power

Summary

Features and Specifications

Product Features

Lists key features like sound adjustment, adjustable input sensitivity, low noise, and housing inclusion.

Technical Specifications

Details headphone output, power supply, and physical dimensions of the preamplifier.

Assembly Hints and Tools

Essential Tools for Assembly

Lists necessary tools such as soldering iron, cutters, pliers, and screwdrivers for kit building.

General Assembly Guidelines

Provides crucial tips for successful assembly, including following instructions, order, and checking component values.

Soldering Instructions

Soldering Best Practices

Explains proper soldering techniques, joint appearance, and trimming excess leads for quality connections.

Component Identification (Part 1)

Diodes, Resistors, and Capacitors

Identifies Zener diode, 1/4W resistors, ceramic, and electrolytic capacitors with their values and codes.

ICs, Trimmers, and Switches

Covers the IC socket, resistor trimmers (RV1, RV2), and the switch (SW1) for the project.

Component Identification (Part 2)

Connectors and LED

Describes RCA connectors, headphones connector, and the LED indicator.

IC and Battery Snap

Details the integrated circuit (NE5532A) and the battery snap connection.

Assembly in the Housing

Mounting PCB and Components

Instructions for attaching the PCB to the housing using spacers and bolts, and installing the tone control shaft and knob.

Final Housing Closure

Describes how to connect the battery and close the housing cover after all internal components are assembled.

Test and Use Procedures

Initial Power-Up and LED Check

Instructions for connecting the battery, switching on, and checking the LED indicator for proper operation.

Headphone and Guitar Input Testing

Guides on testing headphone output with hum and adjusting sensitivity and tone controls with a guitar.

Output Connection and Volume Caution

Advice on connecting the output to stereo systems and a caution regarding volume levels to prevent speaker damage.

Schematic Diagram

Circuit Overview

Presents the complete circuit diagram showing components, connections, and signal flow for the guitar preamplifier.

PCB Layout Guide

Component Placement

Illustrates the physical layout of components on the Printed Circuit Board for correct placement during assembly.

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