Telefunken ECC83 / 12AX7: Complete Guide to the 5 Plate Variants
A Detailed Guide to the Five Main Plate Variants The five principal Telefunken ECC83 plate constructions. The Telefunken ECC83 , equivalent to the American 12AX7, is one of the most recognisable and extensively discussed small-signal vacuum tubes in audio history. Used in preamplifiers, phono stages, recording equipment, integrated amplifiers and countless professional audio circuits, the ECC83 became one of the standard high-gain dual triodes of the valve era. What makes Telefunken production particularly interesting to collectors is that the basic ECC83 appeared with several visibly different internal constructions. Although they all follow the same fundamental ECC83 electrical specification, their anode - or plate - structures changed during production. For practical identification, five principal Telefunken ECC83 plate constructions are particularly useful: · Ribbed Plate · ...