The ECH3 is a triode hexode mixer for broadcast receiver use. The base is the continental side contact type. The oscillator triode has to supply 11 Volts peak to peak for the hexode mixer for correct operation.

The classic envelope is 35 mm in diameter and, excluding the Ct8 base pins, is 88 mm tall.

 
Pin Connections

Ct8	1	2	3	4	5	6	7	8
	h	m	a	g2,g4	g1(t),g3	a(t)	k	h

 
Absolute Maximum Operating Conditions

Hexode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.2	250	100	-2	3.0	3.0	1.3M	0.65

Triode	Va	Vg	mAa
	150	-	3.3

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 02 February 2008 {find valves by name}