A small wonder: QUAD II Class-A KT66 Tube Monoblock Amplifier | odear

From Stereophile:
“Class-A, push-pull Quad II amp used six capacitors, 13 resistors, one choke, two transformers, and five vacuum tubes to convert a line-level monophonic audio signal into 15W of output power, with virtually flat frequency response between 10Hz and 20kHz and no more than 0.1 % of harmonic distortion. The tubes were carefully chosen—a pair of EF86 miniature pentodes for voltage gain and phase splitting (in a single stage), a pair of KT66 "kinkless tetrodes" for output power, and a GZ32 full-wave rectifier—and the output transformer was designed and made with painstaking care.”

GEC KT66 dual "O" rings 🥰 Trial and error. 🎶

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(paid links)
KT66 Vacuum Tube
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Tung-Sol: https://amzn.to/3f6ngsy
JJ Electronics: https://amzn.to/2R4nNDp

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