Valves
For Audio Frequency Amplifiers
A Philips publication by E. Rodenhuis
CONTENTS
CHAPTER I. General Hints on Amplifier Construction;
CHAPTER II. The Valves for the Various Stages;
CHAPTER III. Description of the Valves EF 40, EF 86, ECC 40;
CHAPTER IV. Hints on Practical Uses of the Valve Data;
CHAPTER V. Components and Circuits;
CHAPTER IV. Details of Some Amplifier Circuits:
1. A 3W Gramophone Amplifier
2. A High-Fidelity Amplifier with Two Tubes EL 84 in Push-pull
3. A 10W Class A Amplifier with the EL 34 as Output Valve
4. A 15W A.C./D.C. Amplifier with Two Valves Type PL 81 in Class B Push-pull Circuit
5. A 35W Amplifier with two EL 34 Valves in Class AB Push-pull
6. A 35W Quality Amplifier with Two EL 34 Valves in Class AB
7. A 70W Quality Amplifier with Four EL 34 Valves in Class AB Push-pull
8. A 100W Amplifier with Two EL 34 Output Valves in Class B