The EL822 output pentode is specified for video use, i.e. 5.5 MHz and wide bandwidth i.e. DC to 5.5 MHz. The impedance is high and so is the amplification factor is high. This valve with its 6.3 Volt heater may be designed for professional video.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 70 mm tall.

 
Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	ic	g1	k	h	h	-	a	g2	g3

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.75	250	150	-2.5	40	5	0.1M	13

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 10 June 2007 {find valves by name}