Hi-Fi Amplifier Circuits

 in Adobe PDF format on CDROM 

138 pages 

Contents:

Chapter I GENERAL CONSIDERATIONS ON THE DESIGN OF HI-FI AMPLIFIERS

• Quality requirements for Hi-Fi amplifiers
• Pentode output stage
• Triode output stage
• The "ultra-linear" output stage
• Negative feedback
• Output transformer 
• Single-ended push-pull output stage
• Input stage and phase inverter circuit for a single-ended stages
• Phase inversion push-pull output stage
• Power supply

Chapter II POWER AMPLIFIER CIRCUITS

• A simple 3 W gramophone amplifier
• Another 3 W amplifier with only one tube EeL 86
• 10W Hi-Fi amplifier with two type El 84 pentodes in pushpull
• Hi-Fi amplifier with two tubes EeL 86 in push-pull class AB
• 20 W Hi-Fi amplifier with two pairs of El 84 pentodes in push-pull
• 20 W Hi-Fi amplifier with 2 type El 34 pentodes in ultra-linear push-pull
• 10W single-ended push-pull amplifier with two El 86 pentodes

Chapter III PRE-AMPLIFIERS

• Pre-amplifier using two EF 86 pentodes
• Two-tube pre-amplifier for use with a magneto-dynamic pickup
• Pre-amplifier with noise and rumble filters, using two EF 86 pentodes and the ECC 83 double triode
• Four-channel mixing amplifier

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