The Tungsram HR210 is a battery triode and is equivalent to the Mullard PM1HL etc. These very popular valves were used as detectors.

The classic envelope is 40 mm in diameter, and excluding the B4 base pins is 84 mm tall.

 
Pin Connections

B4	1	2	3	4
	a	g1	f	f

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	2.0	0.1	135	-1.5	2.2	21,500	1.4

This exhibit was last updated on 07 April 2008