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Mono Block 300b/2A3
Audio Note Mono Block 300b/2A3 User Manual
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Page 1
Manual Ve
rsion 3
.5 (
Mk3 Mains
Tx)
- July 2008
2
Table of Contents
Table of Contents
2
Section1: Introduction
3
Chassis Orientation
3
Hardware and Kit Bags
3
General Overview
4
Section 2: Mechanical Section
5
Installing the Grommets
5
Installing the Tang Strips
6
Installing the Mains Transformer
8
Preparing the Secondary Wires
9
Fitting the Hard-Wiring Posts
10
Installing the Choke
11
Installing the Rear 8 Pin Valve Base
12
Fitting the Heat Sink
12
Fitting the Filament Board Support Screw
14
Installing the Output Transformer
14
Installing the Interstage Transformer
15
Section 3: IEC Section
16
Installing the IEC Inlet Plug and Mains Rocker Switch
16
Connecting IEC and Transformer Grounds
17
Connecting the Mains Primary to the Rocker Switch
18
Finishing off the Mains Wiring
19
Section 4: Completing the Power Supply
20
Power Supply Hard-Wiring
21
Additional Wiring for Parallel Triode Operation
30
Section 5: Building and Installing the Filament Board
31
Section 6: Front Insert Plate and Remaining Wiring
38
300B Valve Base Orientation
38
Wiring the Front Plate
41
Filament Wire Connections to 300B and 6SH7
46
Output Transformer Primary Connections
47
Interstage Transformer Wiring
48
Input Signal Earth Connection
53
Speaker Post Installation
53
Tidying up
54
Section 7: Final Checks, Testing, and Finishing off
55
Mono Block Wiring Check List
55
Monoblock Wiring List
55
Checklist
57
Resistance Checks
59
Switching on and Testing
60
Mono Block Testing Kit
61
AC Wall Voltage Checks and Adjustment
61
Fitting the Feet and Base Plate
62
Power on Notes
62
Final Thoughts
63
Appendix
64
Resistor Color Code Reference
65
AC Wiring Guide (Mk3 Mains Transformer)
66
Front Plate Wiring Diagram
67
Power Supply Schematic (Mk3 Mains Transformer)
68
Signal Path Schematic (Single 300B)
69
Signal Path Schematic (Parallel 300B)
70
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Audio Note Mono Block 300b/2A3 Specifications
General
Brand
Audio Note
Model
Mono Block 300b/2A3
Category
Amplifier
Language
English
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