information home


here you will find information and data (circuit diagrams, old literature, reviews etc) concerning vintage Quad equipment...


circuits and data info
Quad circuit diagrams, schematics and data...
Quad II circuit Control 22 circuit Jones plug pin-out
AM2 circuit 303 circuit 405 circuit
33 circuit 22 CD connection 405 mods
33 CD input conversion Valve codes Quad spares suppliers
Quad 50E circuit Quad 50E adaptors Equivalent transistors
Equivalent valves FM3 Mods


literature info
Quad reviews, adverts, posters, history and literature...
Quad 22/II review from 1957 Quad II re-issue review
Quad II/22 article Vintage Quad servicing article
22/II/FM/AM/Esl57 brochure Quad I article
Corner Ribbon speaker article Peter Walker and Quad
Quad II mod article


comming soon: vintage Quad posters, ads and brochures, plus more circuits & data...

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