The 30FL1 is a television valve in a miniature envelope. The low anode voltages and the 300 mA heater requirement confirm this.

The triode, low power beam tetrode was designed as a general purpose valve. Thanks to Simon Pearson for additional data on the 30FL1 and 30FL2.

The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins, is 45 mm tall.

 
Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	a	gt	kt	h	h	a	g2	g1	k,bp,s

 
Absolute Maximum Operating Conditions

Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm
	9.4	0.3	170	170	-2.1	10	2.5	7.5

Triode	Va	Vg	mAa	ra	gm
	200	-7.7	10	5300	3.4

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 02 July 2007 {find valves by name}