This 354V has no external metallisation unlike the NR54 for which it is the commercial equivalent. The original 354V triode dates from 1932 and in 1935 the heater current requirement was reduced to 0.65 Amp.

The envelope is 43 mm in diameter, and excluding the B5 base pins is 90 mm tall. The μ for this valve was 40.

 
Pin Connections

B5	1	2	3	4	5
?	a	g1	h	h	k

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	ra	gm
?	4.0	0.65	250	11,500	3.5