The 5840 is the special quality version of the EF732 pentode. It appears to be an updated version of the EF72.

It is a high impedance device probably used at as an IF amplifier with a tuned anode circuit at a frequency of 10.7 MHz.

The thin glass tube envelope is 9 mm in diameter and, excluding the B8D base pins, is 36 mm tall.

 
Pin Connections

B8D	1	2	3	4	5	6	7	8
	g1	k,g3	h	k,g3	a	h	g2	k,g3

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.15	100	100	-1	7.5	2.4	0.26M	5

This exhibit was last updated on 08 August 2006