The EK2 is an octode frequency changer. The Philips Ct8 base proved unpopular with UK manufacturers and Mullard replaced this valve with the EK32. This is identical to the EK2 but on an IO base. The differences are in anode voltage and current.

The octode has a single electron stream for both oscillator and mixer. The signal would be coupled into the valve via g4 on the top cap.

The classic envelope is 29 mm in diameter and, excluding the Ct8 base pins, is 82 mm tall.

 
Pin Connections

Ct8	1	2	3	4	5	6	7	8	tc
	m	h	h	k	g2	g1	g3,g5	a	g4

 
Absolute Maximum Operating Conditions

Octode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	200	50	-2	2.5	0.8	2M	0.55

Thanks to Frank Philipse for supplying the above datasheet

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This exhibit was last updated on 11 July 2007 {find valves by name}