The EC92 is a single triode. It appears to be a miniature replacement for the EC52 this was a low power VHF transmitting valve.

The side view shows the simple folded anode with the round cavity for the other electrodes at one end. The anode is treated to improve its efficiency at radiating away the heat generated.

The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 46 mm tall.

 
Pin Connections

B7G	1	2	3	4	5	6	7
	a	s	f	f	-	g1	k

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	0.15	250	-2.0	10.0	11,000	5.5

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 10 June 2007 {find valves by name}