Sensibly equivalent¶ to:
The ECC84 is a VHF double triode, and apart from the heater is electrically equivalent to the PCC84. The ECC84 was designed as a cascode low noise RF amplifier.
The 6.3 Volt heater suggests more of a radio focus than television and Band II FM radio reception would seem the target market. probably for quality Band II radio receivers.
One physical feature of this valve is the very small anode cavities.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 48 mm tall.
References: Datasheet & 1040.
Absolute Maximum Operating Conditions¶
Updated July 31, 2012.