Audio Note EL34 - Table of Contents

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Page 2
Table of Contents
Section1: Introduction ............................................................................................................................................................. 3
Component Placement Breakdown..................................................................................................................................... 4
Electrical Safety Warning .................................................................................................................................................... 5
Section 2: First Steps .............................................................................................................................................................. 6
Installing the feet ................................................................................................................................................................. 6
IEC Section Installation ....................................................................................................................................................... 7
Mains Transformer Installation ............................................................................................................................................ 7
IEC Section.......................................................................................................................................................................... 8
Preparing the Secondary leads ......................................................................................................................................... 11
Section 3: Power Supply Board Construction ....................................................................................................................... 12
Installing the Components ................................................................................................................................................. 12
Section 4: Choke Installation and HT Wiring ........................................................................................................................ 14
Section 5: ECF80 Driver Board Construction ....................................................................................................................... 16
Parts List............................................................................................................................................................................ 17
Installing the Spacers and Valve Base.............................................................................................................................. 18
Installing the Resistors ...................................................................................................................................................... 19
Installing the Capacitors .................................................................................................................................................... 20
Section 6: EL34 Hardwired Section ...................................................................................................................................... 22
Parts List............................................................................................................................................................................ 23
Assembly ........................................................................................................................................................................... 23
Section 7: Layout Recap ....................................................................................................................................................... 30
Section 8: EL34 Board Filament Hook-Up ............................................................................................................................ 31
Section 9: EL34 Board To Output Transformer Wiring ......................................................................................................... 33
Section 10: HT and GND Connections to EL34 Board ......................................................................................................... 35
Section 11: Speaker Post Connections ................................................................................................................................ 37
Section 12: Driver Board Filament Hook-up ......................................................................................................................... 41
Section 13: ECF80 to EL34 Board Interconnections ............................................................................................................ 43
Section 14: RCA Connections and Final Earth ..................................................................................................................... 46
Section 15: Powering On and Testing .................................................................................................................................. 49
Power On Procedure ......................................................................................................................................................... 49
Appendix ............................................................................................................................................................................... 50
Resistor Color Code Reference......................................................................................................................................... 51
Mains Transformer Windings Diagram.............................................................................................................................. 52
Power Supply Board Schematic........................................................................................................................................ 53
Driver Board Schematic..................................................................................................................................................... 54
Output Board Schematic ................................................................................................................................................... 55
Output Section Hardwiring Diagram.................................................................................................................................. 56
General Wiring Diagram .................................................................................................................................................... 57
Full Schematic ................................................................................................................................................................... 58