The CV4011 is a sharp cut-off, dual control pentode. The control can be via the suppressor grid as well as the control grid. Uses include mixer and modulator service. The valve has a commercial equivalent 5725 and is a special quality valve. The Valve is optimised for a rugged life such as airbourne equipment.

The side view of the carbonised square box anode shows the spiral grids within.

The thin glass tube envelope is 20 mm in diameter, and excluding the B7G base pins is 37 mm tall.

 
Pin Connections

B7G	1	2	3	4	5	6	7
	g1	k	h	h	a	g2	g3

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.175	200	155	-2.0	5.2	3.5	-	3.2

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 16 April 2007 {find valves by name}