EasyManua.ls Logo

Audio Note Mono Block 300b/2A3 - User Manual

Audio Note Mono Block 300b/2A3
70 pages
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Loading...
Copyright © 2007, 2008 AudioNote Kits
www.AudioNoteKits.com
audionotekits@rogers.com
Page 1
Manual Version 3.5 (
Mk3 Mains Tx) - July 2008

Table of Contents

Question and Answer IconNeed help?

Do you have a question about the Audio Note Mono Block 300b/2A3 and is the answer not in the manual?

Summary

AudioNote Kits Mono Block Amplifier Instruction Manual

Section 1: Introduction

Chassis Orientation

Describes left and right chassis differences and suggests a build order for the mono block.

Hardware and Kit Bags

Explains the provided hardware and the types of metric screws (M3, M4) used in the kit.

General Overview of Build Process

Outlines the general order of the build steps and offers encouragement for the assembly experience.

Section 2: Mechanical Section

Installing the Grommets

Details the process of fitting rubber grommets into the chassis for wire entry points.

Installing the Tang Strips

Explains how to secure tang strips to hold the front and rear faceplates using M3 screws.

Installing the Mains Transformer

Guides the installation of the mains transformer, feeding wires through the chassis using rubber strips.

Preparing the Secondary Wires

Instructs on matching and tidying transformer secondary wires with cable ties for neatness.

Fitting the Hard-Wiring Posts

Describes installing two hardwiring posts using countersunk M3 screws into the chassis.

Installing the Choke

Details the mounting of the choke component using M4 nuts and washers.

Installing the Rear 8 Pin Valve Base

Covers installing the 8-pin valve base, ensuring the notch faces correctly towards the chassis.

Fitting the Heat Sink

Guides the installation of flat screws for the heat sink that will be used later in the build.

Installing the Output Transformer

Explains mounting the output transformer on top of the chassis with correct wire orientation.

Installing the Interstage Transformer

Details the final mechanical step of mounting the interstage transformer, ensuring correct wire feed.

Section 3: IEC Section

Installing IEC Inlet and Mains Rocker Switch

Guides the installation of the IEC inlet plug and mains rocker switch into the chassis.

Connecting IEC and Transformer Grounds

Details connecting the green wire and transformer ground wire to the IEC plug's GND post.

Connecting Mains Primary to Rocker Switch

Explains wiring the mains primary wires to the rocker switch for 120V operation.

Finishing off the Mains Wiring

Covers connecting the brown/blue wire to the IEC plug and tidying the primary wires.

Section 4: Completing the Power Supply

Power Supply Hard-Wiring

Guides the hardwiring of the power supply using tag strips and components like capacitors and resistors.

Additional Wiring for Parallel Triode Operation

Details specific wiring for the parallel triode version, adding resistors for filament supply.

Section 5: Building and Installing the Filament Board

Installing Bridge Rectifiers and Capacitors

Guides the installation of bridge rectifiers and polarized electrolytic capacitors onto the filament board.

Installing Resistors and Wiring Filament Board

Details installing resistors and connecting wires to the filament board's terminals.

Installing LM1084 Regulators

Guides the proper installation of LM1084 voltage regulators onto the board and heatsink.

Connecting Transformer Secondaries to Filament Board

Explains connecting transformer secondary wires to the filament board for tube power supply.

Mounting the Filament Board

Describes installing grommets and mounting the filament board onto the chassis heatsink.

Securing Regulator to Heatsink

Details securing the regulator to the heatsink to ensure proper heat dissipation.

Section 6: Front Insert Plate and Remaining Wiring

300 B Valve Base Orientation

Explains the pin-out and orientation for the 300B valve base to ensure correct connections.

Installing Valve Bases and Tag Strip

Guides the installation of 4-pin and 8-pin valve bases and the tag strip onto the front insert plate.

Wiring the Tag Strip Ground Bus

Details creating a ground bus by wiring a silver wire to the tag strip for common earth connection.

Wiring the Front Plate Components

Provides a detailed wiring diagram for components mounted on the front insert plate.

Connecting Front Plate Components

Covers connecting resistors and capacitors to the 8-pin valve base (6SH7).

Preparing 1 K5 Resistors

Shows how to prepare two 1K5 wirewound resistors for parallel connection.

Installing Front Faceplate

Guides the installation and securing of the completed front faceplate into the chassis.

Input Signal Earth Connection

Details connecting a black wire from the RCA input ground to the tag strip on the insert plate.

Speaker Post Installation

Covers installing speaker posts and connecting output transformer wires based on impedance.

Filament Wire Connections to Tubes

Guides connecting filament wires from the board to the 300B and 6SH7 valve bases.

Output Transformer Primary Connections

Explains connecting the primary wires of the output transformer to the chassis and power supply.

Interstage Transformer Wiring

Details connecting the four colored wires from the interstage transformer to various points.

Connecting Interstage Transformer Wires

Covers extending and connecting the white wire from the interstage transformer via a resistor.

Connecting Red and Black Interstage Wires

Details connecting the red wire to the 8-pin valve base and the black wire to the 15K resistor.

Connecting Blue Interstage Wire

Guides connecting the blue wire from the interstage transformer to the GND tag on the front insert plate.

Tidying Up Wiring

Provides methods for cleaning up and securing unused transformer wires within the chassis.

Section 7: Final Checks, Testing, and Finishing Off

Mono Block Wiring Check List

Lists essential items to check for correct wiring before powering on the amplifier.

MonoBlock Wiring List Review

Reviews major wiring connections in the kit for accuracy.

Switching On and Testing Procedure

Details the procedure for powering on the amplifier and checking tube illumination.

Mono Block Testing Kit Usage

Explains how to use the provided kit for audio signal and hum testing.

AC Wall Voltage Checks and Adjustment

Discusses checking and adjusting for different world AC wall voltages.

Fitting the Feet and Base Plate

Guides the installation of rubber feet and the base plate onto the amplifier bottom.

Power On Notes and Hum Behavior

Describes expected humming during turn-on and its resolution.

Final Thoughts and Congratulations

Concludes the manual, congratulating the builder and providing contact information.

Appendix

Resistor Color Code Reference

Explains how to read resistor color codes for component identification.

AC Wiring Guide (Mk3 Mains Transformer)

Provides diagrams for mains wiring configurations for various world voltages.

Front Plate Wiring Diagram

A schematic diagram detailing the front plate wiring connections.

Power Supply Schematic (Mk3 Mains Transformer)

A detailed schematic of the power supply circuit for the amplifier.

Signal Path Schematic (Single 300 B)

A schematic illustrating the signal path for the single 300B configuration.

Signal Path Schematic (Parallel 300 B)

A schematic illustrating the signal path for the parallel 300B configuration.

Audio Note Mono Block 300b/2A3 Specifications

General IconGeneral
BrandAudio Note
ModelMono Block 300b/2A3
CategoryAmplifier
LanguageEnglish

Related product manuals