The PC88 is a UHF triode designed for the front end RF amplifier in Band IV and Band V television tuners. Mullard describe the PC88 as: a UHF frame-grid grounded grid amplifier triode. Miniwatt is a trade name of Philips and Mullard are the UK subsidiary of Philips.

The construction is planar. The flattened cathode has a frame grid to one side only, beyond the grid is a square U channel anode with its flat end to the grid. The approach to a minimising the lead inductance is to use multiple pins for the grid connection. The relatively high anode current was employed to reduce noise.

Mullard designed a UHF TV tuner around the PC88 operated as a grounded grid amplifier and a PC86 self oscillating mixer. These designs date from 1961.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 47 mm tall.

 
Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	g1	k	g1	h	h	g1	g1	a	g1

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	3.8	0.3	160	-1.25	12.5	4,800	13.5

Thanks to Frank Philipse for supplying the above datasheet

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