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.

 
Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	k(2)	g1(2),s(2)	a(2)	h	h	g(1)	k(1)in	k(1)out	a(1)

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	0.335	90	-1.5	12	4000	6

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 04 July 2009