The NT36 is a British Royal Navy transmitting valve. In its civilian designation it is the DA100 audio triode.

The operating figures given are for a pair in Class AB1 operation. The output to a 4,000 Ohm load is 175 W at 5% total distortion. In Class AB2 service the output is 300 W at 6% total distortion.

The end of the envelope shows the grid in the rectangular anode cavity.

The detail photo shows the grid and the four filament supports.

This valve came complete with its original wooden crate.

The classic envelope is 85 mm in diameter and, excluding the L4 base pins, is 227 mm tall. The L4 base is 55 mm square.

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa
	6.0	2.7	1250	-225	300

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 03 June 2007 {find valves by name}