The CV1053 is a variable-mu RF pentode, with variable screen characteristics, for use as a controlled RF or IF amplifer. The frequency range of operation would be up to 30 MHz.

As a commercial valve the CV1053 can be seen as the EF39 and the two exhibits have identical dimensions suggesting a common production line.

The classic envelope is 29 mm in diameter and excluding the IO base pins it is 84 mm long.

 
Pin Connections

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g2	g3	-	h	k	g1

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.2	250	250	-2.5	6	1.7	1.5M	2.2

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 27 September 2008 {find valves by name}