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Quad II power amplifiers and Quad 22 preamp GEC KT66 Photo #123531
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Quad 22 pre amplifier circuit and information
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Quad 22 pre-amp and two Quad II power amps Photo #845489 - US Audio Mart
Found old QUAD 22 Valve Preamplifier that has been in aunts cupboard
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Quad II power amplifiers and Quad 22 preamp GEC KT66 Photo #123531
Quad-22-preamp-mods
quad 22 preamp