The 6CK5 is an early design for an all glass output pentode rated for 9 watts anode dissipation, and intended primarily for use in AC mains operated equipment and to be used with self-bias or semi-automatic bias only.

This valve has a wider base to the envelope and a locating pip moulded into the glass.

The thin glass tube envelope is 21 mm in diameter and, excluding the B8A base pins, is 68 mm tall.

 
Pin Connections

B8A	1	2	3	4	5	6	7	8
	h	a	k	k,g3	g2	g1	k	h

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pdiss	Pout	D
	6.3	0.7	250	250	-7	36	5.2	40,000	10	9W	4.2W	10%

This exhibit was last updated on 04 November 2007