Elektor Fortissimo-100 Instructions for use
books
Ton Giesberts
Construction Manual
Elektor Fortissimo-100
Power Amplifier Kit
46 pages
instructions
jump
st rter
from project to product
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Elektor Fortissimo-100
Power Amplifier Kit
Designed by Ton Giesberts - Elektor Labs
Construction Manual
V1.0 – date: September 8, 2022,
© Elektor International Media b.v.
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Table of Contents
Table of Contents
Section Page
Notice
This document is complementary to the information contained in:
1. the editorial article “The Elektor Fortissimo-100 Power
Amplifier” published in Elektor Magazine edition 11&12 2022;
2. the engineering background and discussions posted on the
Elektor Labs website.
Web Links to these publications may be found in Section 22.
1 – Kit Contents 7
2 – Introduction 12
3 – Tools Needed 13
4 – Locating and Drilling Holes in the Heatsink,
for the PCB Standoffs 14
5 – Bending the Output Stage Transistor Leads 16
6 – Locating and Drilling Holes in the Heatsink,
for the Transistors 17
7 – Small Resistors and Diodes 19
8 – Axial Power Resistors and IC Socket 20
9 – Small Capacitors and Input Terminal Pins 20
10 – Finishing the Assembly of the Protection PCB 21
11 – Small Transistors, LEDs, Radial Power Resistors,
and Large Capacitors 22
12 – Placing the Loudspeaker-Signal Through-Contact Standoffs 23
13 – Transistors T13…T16 and the Small Heatsinks 24
14 – The Output-Stage Transistors 27
15 – Final Assembly 31
16 – Recommendations for the Enclosure 35
17 – Selecting BC546B/BC556B Transistors for Differential Pairs 36
18 – The SMPS800RE Power Supply 37
19 – Bill of Materials 39
20 – Specifications 43
21 – DC Voltages 45
22 – Web Links 45
23 – Schematics and PCB Layouts 46
Elektor Fortissimo-100 Power Amplifier Kit
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Disclaimer
The circuits described in the manual are for domestic and educational
use only. All drawings, photographs, PCB layouts, and article texts are
copyright Elektor International Media b.v. and may not be reproduced,
transmitted, or stored in any form in whole or in part without the
prior written consent from the Publisher. Patent protection may exist
in respect or circuits and devices described here. The Publisher does
not accept responsibility for failing to identify such patent(s) or other
protection. The Publisher also disclaims any responsibility for the safe
and proper function of reader-assembled projects based upon or from
schematics or information published in or in relation with this Manual.
Published by Elektor International Media b.v., PO Box 11,
NL-6114-JG, Susteren, The Netherlands.
www.elektor.com; www.elektormagazine.com.
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1 – Kit Contents
1 – Kit Contents
• Two PCBs: amplifier PCB and protection PCB.
• All parts listed in the Bill of Materials (BOM) found at the end of
this document (Section 19).
• Construction Manual – Downloadable PDF.
Figure 1. Contents of the Fortissimo-100 Power Amplifier kit
as supplied by the Elektor Store.
Before embarking on the construction of the Kit, be sure to inspect the
contents using the Bill of Materials and the photos that follow. Check
that all parts are supplied and in usable condition.
Elektor Fortissimo-100 Power Amplifier Kit
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Figure 2. The resistors and small capacitors in the kit.
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1 – Kit Contents
Figure 3. The electrolytic capacitors in the kit.
Figure 4. The small transistors, diodes, and other parts in the kit.
Elektor Fortissimo-100 Power Amplifier Kit
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Figure 5. The larger transistors.
Figure 6. The ceramic pads (washers) and the relay in the kit.
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Figure 7. The mechanical parts in the kit.
Figure 8. The SK104 heatsinks in the kit.
1 – Kit Contents
Table of contents
