The 803 transmitting triode was made for government use only, and this suggests a special quality version. The maximum anode dissipation was designed to be 125 Watts and in Class C RF amplifier mode it could produce 155 Watts of output power.

The 813 has a thoriated tungsten filament.

See 803 for details.

The wide glass tube envelope is 60 mm in diameter and, excluding the base pins is 216 mm tall.

 
Pin Connections

	1	2	3	4	5	tc
	f	g2	g1	g3	f	a

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs
	10.0	5.0	2,000	600	-	160	20

Thanks to Frank Philipse for supplying the above datasheet

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This exhibit was last updated on 02 February 2008 {find valves by name}