The CV133 triode was specified as both an amplifier and an RF power valve and in commercial form is a 6C4. In the latter role it would deliver 5.5 Watts. With a very small envelope volume, this would make it ideal for hand portable equipment. In larger apparatus it could deliver enough drive power for much larger PA's.

The anode is a flattened cylinder that is treated to produce a better radiating surface.

The thin glass tube envelope is 18 mm in diameter, and excluding the B7G base pins is 45 mm tall.

 
Pin Connections

B7G	1	2	3	4	5	6	7
	a	k	h	h	a	g	k

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	mAa	gm	Pdriv	Pout	Pdiss	freq	f.max
	6.3	0.15	250	10.5	2.2	0.35W	5.5W	5W	70	150

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 19 November 2007 {find valves by name}