The data sheets on this page come from the third volume of a three volume valve (tube) and semi-conductor manual issued by Amperex in 1965. Other valves encompassed are the GZ34, EL34, EL84, and EC82. Some of the sheets originally came from Philips, others from Mullard. Those for the ECC83 are more extensive than those embodied in early Mullard books.

Early Mullard data sheets for the ECC83 are available on this page.

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