EI EL519 / 6KG6A NOS
The PL519 is a line output valve. This example is of late manufacture and probably the last to be produced before transistors took over the role. They would be found in large screen colour televisions with an EHT of around 25 kV and thus requiring considerable line drive power. Thank to high valus characteristics this tubes is also used in HF linear power amplifiers. Highest reliablility version.
