The RCA type 26 audio triode is a directly heated AC triode for audio amplification.

The side view of the anode showing the flat box construction.

The black composition base shows the RCA make, the RCA Victor brand name and the HMV logo.

The classic envelope is 44 mm in diameter, and excluding the UX4 base pins is 99 mm tall.

 
Pin Connections

UX4	1	2	3	4
	f	a	g1	f

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	1.5	1.05	180	-14.5	6.2	7,300	8.3

Thanks to Frank Philipse for supplying the above datasheet

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This exhibit was last updated on 19 April 2008 {find valves by name}