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.
Absolute Maximum Operating Conditions¶
Updated April 30, 2013. shape:classic construction:pinch type:triode age:1930.1940 base:b4 heater:2.0v pins:4 pin:1.a pin:2.- pin:3.f pin:4.f pin:tc.g1