The 6481 is a high frequency disc seal planar triode. It would probably be used in grounded grid configuration for maximum isolation between input and output circuits.

The 6481 was designed for use in microwave circuits at up to 3.3 GHz as an amplifier or oscillator.

The envelope is 15 mm in diameter and, excluding the base pins, is 57 mm tall. The contact rings are 20 mm in diameter.

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	gm	μ
	7.0	0.45	350	-15	35	4.5	25

Thanks to Frank Philipse for supplying the above datasheet

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