The Ferranti S2 is a screen grid tetrode. It was designated for use as a frequency changer in battery radio receivers where it would be heated by a two Volt accumulator.

The classic envelope is 42 mm in diameter and, excluding the B4 base pins, is 106 mm tall.

 
Pin Connections

B4	1	2	3	4	tc
	g2	g1	f	f	a

 
Absolute Maximum Operating Conditions

Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	2.0	0.3	120	60	-1	2.25	0.3	0.3M	1.1

This exhibit was last updated on 30 June 2006