Circuits from magazine "Audio Engineering" I
Quality Audio Amplifiers
Using 6550 Tube
(1)
(2)
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Using EL34 Tube
Symmetrical amplifier
Semi-Symmetrical amplifier
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Semi-Symmetrical amplifier Using KT77 from GEC England (EL34 similar)
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Using 5881 Tube
(1)
(2)
(3)
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Cathode follower Triode power output
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