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.
This exhibit shows a different style of lettering to our other D210SW.
The plain reverse. Note the wire fixed to the glass that provides the connection to the metal screening paint.
The classic envelope is 39 mm in diameter, and excluding the B4 base pins, is 1o0 mm tall.
Reference: 1043. Type D210SW was first introduced in 1936.
Absolute Maximum Operating Conditions¶
Updated March 26, 2019. 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