This manual covers servicing for Hi-Fi preamplifiers and amplifiers from the 1957-1958 model years, encompassing a wide range of manufacturers including Bell Sound, Challenger, David Bogen, Electro-Voice, Fisher, Grommes, Hamilton, Harmon-Kardon, Knight, Madison Fielding, Newcomb, Pilot, H.H. Scott, Sherwood, and Stromberg-Carlson. It details specific models such as the Bell Sound 3DT (G) and 2315, David Bogen L60 and PR100A, Fisher 80-AZ, and Harmon-Kardon A-1040, among many others. This collection represents a significant period in audio technology, focusing on the high-fidelity equipment that defined the mid-to-late 1950s.
The purpose of this 162-page English-language digital manual is to provide comprehensive technical information for the maintenance and repair of these vintage audio devices. It includes detailed circuitry diagrams, essential specifications, and a list of replacement parts, all crucial for understanding and servicing the vacuum tube technology prevalent in this era. This resource is designed to assist technicians and enthusiasts in preserving the performance and functionality of these classic Hi-Fi preamplifiers and amplifiers.
“Servicing Hi-Fi Preamps and Amplifiers” (1959, 162 pages). This book contains complete information on the circuitry, specifications and replacement parts for 1957-58 Preamps and Amplifiers. Data on the following brand names and models appears in this volume:
Bell Sound 3DT (G)
Bell Sound 2315
Challenger CHA33, CHA33Y
David Bogen L60
David Bogen PR100A
David Bogen ST-10, ST-10G
Electro-Voice A15
Electro-Voice A20
Electro-Voice A30
Electro-Voice PC2
Fisher PR-6
Fisher 80-AZ
Grommes 212
Grommes 221
Hamilton PMX-6
Harmon-Kardon A-1040 “Trend II”
Knight 93SZ505, 93SZ737
Knight 93SZ645
Knight 93SZ655
Knight 93SZ682
Knight 94SX706
Madison Fielding OR-45 “Transamp”
Newcomb CO-1010
Newcomb CO-1012
Newcomb CO-1020
Pilot AA-903B
Scott (H.H.) 223
Sherwood S-1000-II
Stromberg-Carlson AR-411
Stromberg-Carlson AR-419
The original book was scanned and converted into this digital file in Adobe Acrobat .pdf format. In order to view this file you will need to have Adobe Acrobat Reader installed on your computer.
“Servicing Hi-Fi Preamps and Amplifiers” (1959, 162 pages). This book contains complete information on the circuitry, specifications and replacement parts for 1957-58 Preamps and Amplifiers. Data on the following brand names and models appears in this volume:
Bell Sound 3DT (G)
Bell Sound 2315
Challenger CHA33, CHA33Y
David Bogen L60
David Bogen PR100A
David Bogen ST-10, ST-10G
Electro-Voice A15
Electro-Voice A20
Electro-Voice A30
Electro-Voice PC2
Fisher PR-6
Fisher 80-AZ
Grommes 212
Grommes 221
Hamilton PMX-6
Harmon-Kardon A-1040 “Trend II”
Knight 93SZ505, 93SZ737
Knight 93SZ645
Knight 93SZ655
Knight 93SZ682
Knight 94SX706
Madison Fielding OR-45 “Transamp”
Newcomb CO-1010
Newcomb CO-1012
Newcomb CO-1020
Pilot AA-903B
Scott (H.H.) 223
Sherwood S-1000-II
Stromberg-Carlson AR-411
Stromberg-Carlson AR-419
The original book was scanned and converted into this digital file in Adobe Acrobat .pdf format. In order to view this file you will need to have Adobe Acrobat Reader installed on your computer.
