The PL509 was one of the last TV line timebase output pentode valves to be designed. The PL519 replaced the PL509 and was pin compatible. These valves were designed for service in colour television receivers employing shadow mask tubes.

The normal anode voltage of 160 V is designed to be exceeded by pulses of up to 8,000 Volts and 1.4 Amps.

Radio amateurs also used such valves, known in America as 'sweep tubes' for short-wave transmitters, sometimes with the valves in parallel to increase the power available.

The wide glass tube envelope is 38 mm in diameter and excluding the B9D base pins, is 114 mm tall.

 
Pin Connections

B9D	1	2	3	4	5	6	7	8	9	tc
	g1	g3	g2	h	h	g2	g3	g1	k	a

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	mAa
	40	0.3	160	160	1400,Pdiss_30W

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 10 June 2007 {find valves by name}