Sensibly equivalent¶ to:
The Cossor 210PG is a heptode or Pentagrid mixer and is also known as the 210SPG.The grid is wound with a variable pitch to give a variable-μ characteristic and so this would have been used in domestic broadcast superhet receivers.
The 210PG dates from 1934 and would have been fitted with a scew top cap, sadly missing as so many valves from this era seem to be.
The 210PG is a directly heated mixer designed for battery operation and with a filament current of 100mA could be used with dry batteries.
The reverso of the envelope is plain metalisation.
The classic envelope is 45 mm in diameter, and excluding the B7 base pins is 104 mm tall.
References: Datasheet, & 1043. Type 210PG was first introduced in 1934.
Absolute Maximum Operating Conditions¶
Updated November 18, 2016. shape:classic construction:pinch type:heptode age:1930.1940 base:b7 heater:2.0v pins:7 pin:1.g2 pin:2.g1 pin:3.g3.g5 pin:4.f pin:5.f pin:6.m pin:7.a pin:tc.g4