Amplifier Design using ECC81 ECC82 and ECC83

Designing a Class A push-pull audio amplifier using the ECC81, ECC82, and ECC83 valves is very simple if you read this wonderful article. This multi-page document contains a typical valve circuit, recommended by Mullard Engineers, for making a Class A Push-Pull amplifier using two ECL80 triode pentodes. This must be the holy grail of information on how to use these valves to make an amplifier. The article shows how to choose the valves, and the holders, including a typical circuit diagram of the stages involved, and finally the valves involved in the power supply design. I thought it was an extremely useful article for any engineer who wishes to make his own valve amplifier or needs high-quality information to repair such amplifiers.

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