The 6F6G output pentode was designed for audio amplification in radio receivers. The operating values given are for single ended use with an anode load of 7,000 Ohms.

If a pair are used as an audio amplifier in push pull class A, 10.5 Watts are possible with 3% distortion.

The equivalent type KT63 is a beam tetrode.

The classic envelope is 42 mm in diameter and excluding the IO base pins the length is 95 mm.

 
Pin Connections

IO	1	2	3	4	5	6	7	8
	m	h	a	g2	g1	-	h	k

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	6.3	0.7	285	285	-20	38	7	78k	2.55	4.5W	9%

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 04 July 2007 {find valves by name}