Designed as general purpose triodes, two independent valves exist in the ECC82 envelope. A special quality version was also produced, the E82CC. Designed for differential amplifiers in industrial equipment, the anti-microphonic and matched pair version E182CC was also made.
The ECC82 is practically a pair of 6C4 in one envelope.
This is a 21st century version made by JJ Electronics.
An amplification factor of 17 is quoted, which is much lower than that for the pin compatible ECC83 at 100.
The anode design of this ECC82 includes a depressed centre usually found on the ECC86 and similar VHF valves.
The central screen and copper connections to the base pins.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 49 mm tall.
References: Data-sheet & 1040. Type ECC82 was first introduced in 1951.