The Hivac D210SW is a battery triode with a ceramic base and a rich Gold metalisation. It dates from 1936 when Hivac introduced their SW or Short Wave versions of earlier valves. The ceramic base was made from 'Frequentite'.

With a 2 Volt filament was designed to be heated from an accumulator supply.

The classic envelope is 37 mm in diameter, and excluding the B4 base pins, is 110 mm tall.

Reference: ¹⁰⁴³. Type D210SW was first introduced^¶ in 1936.

 
Pin Connections

B4	1	2	3	4	tc
	a	-	f	f	g1

 
Absolute Maximum Operating Conditions^¶

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	2.0	0.1	150	-4.5	2.4	12,000	1.35