Up for sale is a single piece (1 PC) of authentic vintage Tungsram ECC83 (12AX7) dual triode vacuum tube, packed in a box. Manufactured in Hungary, this classic tube features distinct welded plates, a foil disc getter, and silver top getter flashing. Tungsram ECC83s are highly sought after by audiophiles and guitarists alike for their incredible gain structure, detailed dynamics, extremely low noise floor, and warm, punchy tone in preamplifiers and phono stages.

As shown, the tube has been thoroughly tested on an advanced Amplitrex AT1000 tube testing system in full fixed-bias mode. Plate current (Ip) and mutual conductance (Gm) measurements alongside percentage performance ratings relative to nominal factory specs are detailed in the table below.